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ODPERMIT / STATE FIELD GUIDE WA

WashingtonOversize & overweight permits.

Washington quotes need loaded measurements, axle weights and route mileage. Check permit charges, pilot cars and mountain-pass or route restrictions before dispatch.

Calculate WA permit feesRequest permit help

General information only, not legal advice or a permit. Confirm with the issuing agency before you move. Read the disclaimer

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Washington · General width8′6″
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  1. 01Legal size

    What is legal without a permit?

    Axle limits Legal With a permit
    • Single20k / 22k lb
    • Tandem34k / 43k lb
    • Group, 7′ to under 10′ spreadFeet × 6,500
    • Group, 10′ to under 30′ spread(Feet + 20) × 2,200
    • Group, 30′ spread or more(Feet + 40) × 1,600
    • Permit weight is also capped at 600 lb per inch of tire width; the lowest limit governs.
    • Legal gross can reach 105,500 lb only when tire size, axle weights and the weight table allow it; the table reaches 105,500 lb only with 6 to 9 axles spread at least 59′ (9 axles) to 86′ (6 axles).
    • Bridge restrictions may limit single axles to 21,500 lb or less on selected highways.
    • With a permit, a single axle may carry up to 45,000 lb on qualifying large-rim tires.
    2WSDOT — Washington State Commercial Vehicle Guide M 30-39.10 (July 2025) · checked Oct 13, 2026
    The rule in full4 official sources

    General width: 8′6″

    Ordinary vehicle-and-load limit; safety-device, vehicle and load exceptions may apply.

    Loaded height: 14′

    Ordinary vehicle-and-load limit; listed exceptions and actual route clearances apply.

    NN semitrailer: 48′

    Federal National Network allowance for a tractor with one semitrailer. Longer trailers may qualify under state axle-position and route rules; local roads can differ.

    Overall length: No NN cap*

    *For a tractor with one compliant semitrailer on the National Network. Other combinations, trailers, projecting loads and local access have separate limits; see the state measurements below.

    Interstate weight: 80,000 lb*

    *Federal baseline, subject to the bridge formula, registration and postings: 20,000 lb single axle and 34,000 lb tandem. A particular configuration may have a lower limit; state grandfather allowances need verified spacing and route eligibility.

    Legal size

    Legal limits are 8′6″ wide and 14′ high. Single units, trailers, doubles, logging and specialized combinations have their own length and overhang rules.

    Weight limits

    Gross weight alone does not settle it in Washington. Check tire factors, axle and group weights, spacing, the weight table, bridge formula, registration and route postings.

    Axle limits: legal and with a permit

    Legal: single 20,000 lb, tandem 34,000 lb. With a permit: single 22,000 lb, tandem 43,000 lb, group, 7′ to under 10′ spread feet × 6,500, group, 10′ to under 30′ spread (feet + 20) × 2,200, group, 30′ spread or more (feet + 40) × 1,600. Permit weight is also capped at 600 lb per inch of tire width; the lowest limit governs. Legal gross can reach 105,500 lb only when tire size, axle weights and the weight table allow it; the table reaches 105,500 lb only with 6 to 9 axles spread at least 59′ (9 axles) to 86′ (6 axles). Bridge restrictions may limit single axles to 21,500 lb or less on selected highways. With a permit, a single axle may carry up to 45,000 lb on qualifying large-rim tires.

  2. 02Requirements

    Where each requirement starts

    Pilot carsWidth over 11′

    Over 11′ wide: one front and one rear pilot car on two-lane highways.

    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    What official sources leave open12

    Where Washington’s official sources disagree or say nothing, confirm with the agency before dispatch.

    • Holiday dates: WSDOT names the restricted holidays but publishes no calendar dates. Memorial Day, Labor Day and Thanksgiving dates follow RCW 1.16.050 (last Monday of May, first Monday in September, fourth Thursday in November). WSDOT does not say whether an observed weekday holiday is restricted when a holiday falls on a weekend (RCW 1.16.050(5) moves state legal holidays to the Monday or Friday, e.g. Monday July 5, 2027 and Friday December 24, 2027); those observed days are not listed.
    • Holiday wording conflict: WAC 468-38-175 and the WSDOT curfew page say permitted loads "may be restricted" on the holidays from noon the day before; Form 560-002 (rev. 07/2023) says overweight vehicles that cannot keep traffic speed and all over-dimensional loads "are prohibited" on those holidays and "during the afternoon of the day preceding". Plan as if the ban applies.
    • Superload lead-time conflict: WAC 468-38-405 and the superload page text require 30 days for loads over 200,000 lb and 7 calendar days for size-only superloads, but the superload form note on the same page and the Permit types page say to submit any superload request at least 30 days before the move.
    • Visibility conflict inside WAC 468-38: -095(5) bars moves at visibility of 1,000′ or less; -175(3) says 500′. The stricter 1,000′ rule is shown.
    • No fixed size or weight threshold for law enforcement escorts; WSDOT may require them on superloads, and the region may require State Patrol on building moves.
    • No published maximum permitted length or height; routes, curves and overhead clearances decide (WAC 468-38-070). The 14′/20′/32′ width caps in RCW 46.44.092 apply outside cities and towns.
    • No weekend travel ban appears in WAC 468-38-175; the Commercial Vehicle Guide lists "Weekend" among restrictions some overlength permits are exempt from, without defining one.
    • WSDOT's OS/OW pages state no separate operating-authority or bond requirement for a permit; the permit relies on liability insurance (WAC 468-38-050) and normal licensing.
    • The context page shows an 80,000 lb federal baseline; Washington's Commercial Vehicle Guide gives a legal gross maximum of 105,500 lb, governed by tire size, axle weights and the weight table (which reaches 105,500 lb only for 6 to 9 axles with long spacing). WSDOT's pages state no separate Interstate gross cap.
    • No toll-facility oversize permit rules were found on WSDOT commercial vehicle pages.
    • Permit axle caps: the Commercial Vehicle Guide caps overweight permits at 22,000 lb single and 43,000 lb tandem (RCW 46.44.091), but WSDOT's permits page lists office-issued "8-tire axle weight permits over 43,000 lbs. on a tandem or 22,000 lbs. on a single axle", and RCW 46.44.091(3)-(4) allows exceptions. Heavier axle permits need WSDOT review.
    • Superload length wording differs: WAC 468-38-405 says trailing unit(s) plus load over 125′; WSDOT's superload page says 125′ of load length.
    The rule in full6 official sources

    Width 8′6″: Legal width

    Up to 8′6″ wide moves without a permit; wider needs one.

    Width 11′: 2 pilot cars on two-lane roads

    Over 11′ wide: one front and one rear pilot car on two-lane highways.

    Width 12′: Night-move limit

    Loads up to 12′ wide, 14′6″ high and 105′ long may move at night. Bigger loads move at night only when the permit says "Nighttime movement approved."

    Width 14′: Rear pilot on multilane

    Over 14′ wide: one rear pilot car on multilane highways, on top of front and rear pilot cars on two-lane highways.

    Width 14′: Two-lane width cap

    Outside cities and towns, 14′ is the most WSDOT permits on a two-lane state highway, unless the highway is built for more or another listed exception applies.

    Width 16′: Superload

    A non-divisible load over 16′ wide is a superload.

    Width 20′: Front + rear on undivided multilane

    Over 20′ wide: one front and one rear pilot car on multilane undivided highways.

    Width 32′: Undivided multilane cap

    Outside cities and towns, 32′ is the most WSDOT permits on a multilane highway without a median barrier, unless the highway is built for more or another listed exception applies.

    Height 14′: Legal height

    Up to 14′ high moves without a permit; taller needs one.

    Height 14′6″: Height pole

    Over 14′6″ high: one front pilot car with a height pole on all highways.

    Height 16′: Superload

    A non-divisible load over 16′ high is a superload.

    Length 53′: Legal trailer length

    A single trailer may be 53′ long without a permit, and up to 56′ with a permit.

    Length 105′: Rear pilot on two-lane

    Trailer plus load over 105′ on a tractor-trailer: one rear pilot car on two-lane highways.

    Length 125′: Rear pilot on multilane

    Trailer plus load over 125′ on a tractor-trailer: one rear pilot car on multilane highways too.

    Length 125′: Superload

    A non-divisible load with more than 125′ of load length is a superload.

    Overhang 3′ front: Legal front overhang

    The load may stick out up to 3′ past the front wheels or front bumper without a permit.

    Overhang 4′ rear: Flags

    A load more than 4′ past the rear (or more than 4″ past the sides) must show red or orange fluorescent flags at least 18 inches square at its extremities.

    Overhang 15′ rear: Legal rear overhang

    Without a permit, nothing may extend more than 15′ behind the center of the last axle.

    Overhang 20′: Front overhang pilot car

    Front overhang over 20′, measured from the center of the steer axle: one front pilot car on all two-lane highways.

    Overhang 20′: Single-unit rear overhang pilot car

    On a single-unit truck, rear overhang over 20′ measured from the center of the rear axle: one rear pilot car on two-lane highways.

    Weight 105,500 lb: Legal gross maximum

    105,500 lb is the legal gross maximum. Tire size, axle weight (20,000 lb single, 34,000 lb tandem) and the weight table each cap gross weight and the lowest governs; the table reaches 105,500 lb only with 6 to 9 axles spread at least 59′ (9 axles) to 86′ (6 axles) from first to last axle.

    Weight 200,000 lb: 30-day written application

    A permit for a combination over 200,000 lb gross must be applied for in writing at least 30 days before the move.

  3. 03The permit

    Which permit do you need?

    1. WSDOT permits cover state routes.
    2. City and county roads need approval from whoever maintains them, and belong in the route plan.
    Washington State Department of Transportation, Commercial Vehicle Services
    SuperloadsOver 16′ W/H · 125′ L · 200,000 lb

    A non-divisible load is a superload when any of these is true:

    • Over 16′ wide
    • Over 16′ high
    • Trailer plus load over 125′ long
    • Over 200,000 lb
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    Superload lead time30 days by weight · 7 days by size

    Superload applications go in writing (electronic counts) ahead of the move:

    • Over 200,000 lb: at least 30 calendar days before the move
    • Size-only superloads: at least 7 calendar days before the move
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    Bridge and pavement analysisSuperloads · traffic control plan

    WSDOT analyzes bridges and pavement for a superload it finds necessary. The superload request must include:

    • Why the move is needed and why it can't be split, with a sketch or photo
    • A loaded-vehicle sketch with axle loads, spacings, tire sizes and dimensions
    • A proposed route, plus proof that any county or city on it will issue permits
    • A traffic control plan: delays, lane restrictions, pilot cars and flaggers, overhead obstacles, railroad crossings, emergency vehicle access
    • WSDOT may ask you to share the cost of an analysis that takes significant staff time
    7WSDOT — Superloads · checked Oct 13, 2026
    Width caps by road type14′ two-lane · 20′ divided · 32′

    Outside cities and towns, WSDOT permits stop at these widths unless the highway is built for more or another listed exception applies:

    • Two-lane highways: 14′
    • Multilane highways with a median barrier: 20′
    • Multilane highways without a median barrier: 32′
    8RCW 46.44.092 — Special permits—Overall width limits · checked Oct 13, 2026
    Permit axle limits22,000 single · 43,000 tandem

    Overweight permits are capped at the lowest of these:

    • 600 lb per inch of tire width
    • 22,000 lb on a single axle
    • 43,000 lb on a tandem axle
    • Axle groups by spread: 7′ to under 10′ = feet × 6,500; 10′ to under 30′ = (feet + 20) × 2,200; 30′ or more = (feet + 40) × 1,600
    • Bridge restrictions may hold single axles to 21,500 lb or less on some highways
    • Exception: a single axle on qualifying large-rim tires may carry up to 45,000 lb (at 600 lb per inch of tire width)
    2WSDOT — Washington State Commercial Vehicle Guide M 30-39.10 (July 2025) · checked Oct 13, 2026
    Self-issued single-trip permitsUp to 16′ W · 16′ H · 125′ · 200,000

    Registered carriers can self-issue single-trip permits online 24/7 in eSNOOPI Pro, within these limits:

    • 16′ wide, 16′ high, 125′ trailer load length, 200,000 lb gross
    • Tractor-trailer combinations only (jeeps and boosters allowed); not valid for double trailers
    • Weight permits need an axle spacing report number
    9WSDOT — Self-issue a permit · checked Oct 13, 2026
    Permits you can't fully self-issueSuperloads · night over 12′/14′6″/105′

    WSDOT lists these as needing its approval or as not available to self-issue:

    • Needs approval: night travel over 12′ wide, 14′6″ high or 105′ overall length
    • Needs approval: farm implement permits, and manufactured housing beyond the transport-route allowances
    • Not self-issued: superloads over 16′ wide, 16′ high, 125′ load length or 200,000 lb
    • Not self-issued: 8-tire axle weight permits over 43,000 lb on a tandem or 22,000 lb on a single axle
    3WSDOT — Commercial vehicle permits · checked Oct 13, 2026
    County roads and city streetsSeparate local approval

    A WSDOT permit covers state routes only. County roads and city streets need approval from the city or county, and those miles still go on the state permit.

    • The Commercial Vehicle Guide lists county and city phone numbers to call before moving on local roads
    2WSDOT — Washington State Commercial Vehicle Guide M 30-39.10 (July 2025) · checked Oct 13, 2026
    Official route and permit tools
    The rule in full9 official sources

    Roads & authorities

    WSDOT permits cover state routes. City and county roads need approval from whoever maintains them, and belong in the route plan.

    When a permit is needed

    Loads over legal limits need a WSDOT permit before entering or moving in Washington. Permits range from a single trip on one route to 30-day and annual permits.

    Superloads

    Routine permits cover set size ranges for various loads, manufactured homes and trailers. Superload review starts over 200,000 lb, over 16′ high, over 16′ wide, or over 125′ of trailer and load length.

    Superloads

    A non-divisible load is a superload when any of these is true: Over 16′ wide. Over 16′ high. Trailer plus load over 125′ long. Over 200,000 lb.

    Superload lead time

    Superload applications go in writing (electronic counts) ahead of the move: Over 200,000 lb: at least 30 calendar days before the move. Size-only superloads: at least 7 calendar days before the move.

    Bridge and pavement analysis

    WSDOT analyzes bridges and pavement for a superload it finds necessary. The superload request must include: Why the move is needed and why it can't be split, with a sketch or photo. A loaded-vehicle sketch with axle loads, spacings, tire sizes and dimensions. A proposed route, plus proof that any county or city on it will issue permits. A traffic control plan: delays, lane restrictions, pilot cars and flaggers, overhead obstacles, railroad crossings, emergency vehicle access. WSDOT may ask you to share the cost of an analysis that takes significant staff time.

    Width caps by road type

    Outside cities and towns, WSDOT permits stop at these widths unless the highway is built for more or another listed exception applies: Two-lane highways: 14′. Multilane highways with a median barrier: 20′. Multilane highways without a median barrier: 32′.

    Permit axle limits

    Overweight permits are capped at the lowest of these: 600 lb per inch of tire width. 22,000 lb on a single axle. 43,000 lb on a tandem axle. Axle groups by spread: 7′ to under 10′ = feet × 6,500; 10′ to under 30′ = (feet + 20) × 2,200; 30′ or more = (feet + 40) × 1,600. Bridge restrictions may hold single axles to 21,500 lb or less on some highways. Exception: a single axle on qualifying large-rim tires may carry up to 45,000 lb (at 600 lb per inch of tire width).

    Self-issued single-trip permits

    Registered carriers can self-issue single-trip permits online 24/7 in eSNOOPI Pro, within these limits: 16′ wide, 16′ high, 125′ trailer load length, 200,000 lb gross. Tractor-trailer combinations only (jeeps and boosters allowed); not valid for double trailers. Weight permits need an axle spacing report number.

    Permits you can't fully self-issue

    WSDOT lists these as needing its approval or as not available to self-issue: Needs approval: night travel over 12′ wide, 14′6″ high or 105′ overall length. Needs approval: farm implement permits, and manufactured housing beyond the transport-route allowances. Not self-issued: superloads over 16′ wide, 16′ high, 125′ load length or 200,000 lb. Not self-issued: 8-tire axle weight permits over 43,000 lb on a tandem or 22,000 lb on a single axle.

    County roads and city streets

    A WSDOT permit covers state routes only. County roads and city streets need approval from the city or county, and those miles still go on the state permit. The Commercial Vehicle Guide lists county and city phone numbers to call before moving on local roads.

  4. 04Permit cost

    What does the permit cost?

    Example agency fee$10
    • 8′7″ W
    • 13′ H
    • 70′
    • 72,000 lb
    • 100 miles
    The rule in full2 official sources

    Example agency fee

    $10 for a nondivisible load 8′7″ wide, 13′ high and 70′ long at 72,000 lb gross, on a five-axle truck with a 48′ trailer, for 100 miles in Washington. Enter your own load in the calculator below.

    What the fee covers

    Washington's fee depends on the permit product and the loaded vehicle. The calculator itemizes the published charges it can price. Local permits, escorts, tolls, payment charges and ODPermit services are separate.

  5. 05Pilot cars

    When do you need pilot cars?

    Width
    Height
    Length
    1 front + 1 rear on two-lane roadsNo pilot car on multi-lane undivided roads and divided highways

    Minimums by size alone. Combined dimensions, night moves and the issued permit can add escorts.

    Height poleOver 14′6″ · 3–6″ above load

    Over 14′6″ high, the lead pilot car runs a nonconductive height pole set 3 to 6 inches above the load's highest point.

    • Pole mounted on the front of the lead pilot car
    • Upper part flexible so it won't damage wires or lights
    • Remove, tie down or lower the pole when not escorting a tall load or pre-running a route
    • Manufactured housing: pole not needed until the unit is over 15′ high
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    Law enforcement escortsSuperloads: when WSDOT requires

    WSDOT may require law enforcement vehicles on a superload, depending on the load, the route and the time of day. Follow the issued permit.

    • Building moves: notify the Washington State Patrol 48 hours ahead; the region may require you to hire the State Patrol for traffic control
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    Pilot car equipmentAmber light · sign · radio

    A car, van or two-axle truck up to 16,000 lb with a body 60–102″ wide, not towing a trailer, equipped with:

    • At least one flashing or rotating amber light or strobe above the roof, visible 360° and from 500′; headlights on while escorting
    • An OVERSIZE LOAD roof sign at least 5′ wide and 10″ high, black 8″ letters on yellow, shown only while escorting
    • An OVERSIZE LOAD roof sign at least 5′ wide and 10″ high, black letters at least 8″ high on yellow, shown only while escorting
    • 18″ STOP/SLOW paddle, three reflective triangles, a 5-lb B,C fire extinguisher, first-aid kit and a flashlight with red cone
    • High-visibility Class 2/3 garment and hard hat when working outside the car
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    Pilot car operator certificationWA card · renew every 3 years

    Pilot car operators must be certified and carry the card while escorting:

    • 8-hour initial course or 4-hour recertification course from a WSDOT-approved provider
    • Written test with at least an 80% score
    • Washington cards are renewed every three years
    • For-hire operators carry commercial auto insurance of $100,000/$300,000 bodily injury and $50,000 property damage
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    Out-of-state pilot cards8 states accepted

    Operators licensed outside Washington may use a certification from a state WSDOT recognizes:

    • Arizona, Colorado, Georgia, Minnesota, North Carolina, Oklahoma, Utah, Virginia
    11WSDOT — Pilot & escort vehicle · checked Oct 13, 2026
    Extra pilot car triggersWide + tall · overhang · mirrors

    These add pilot cars beyond the size bands:

    • Over 12′ wide on a multilane highway and tall enough to need a front pole car: add a rear pilot car
    • Rear overhang (from the rear axle) more than one-third of trailer-plus-load length: rear pilot car on two-lane highways
    • Driver can't see 200′ behind along both sides in the mirrors: rear pilot car on all highways
    • WSDOT can add pilot cars whenever it decides public safety needs them
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    Riding flag personLength triggers only

    For the over-105′ and over-125′ length triggers and the long-rear-overhang trigger, the permit may allow a certified riding flag person instead of a pilot car. The flag person may ride in the truck with the carrier's OK.

    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    No convoys without approvalOnly if WSDOT authorizes

    Loads that need pilot cars may not travel in convoy unless WSDOT specifically authorizes it, and one pilot car may not escort two loads at once unless the permit says so.

    • Farm implement convoys are allowed with pilot cars front and rear and 500′ between implements
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    The rule in full3 official sources

    Height pole

    Over 14′6″ high, the lead pilot car runs a nonconductive height pole set 3 to 6 inches above the load's highest point. Pole mounted on the front of the lead pilot car. Upper part flexible so it won't damage wires or lights. Remove, tie down or lower the pole when not escorting a tall load or pre-running a route. Manufactured housing: pole not needed until the unit is over 15′ high.

    Law enforcement escorts

    WSDOT may require law enforcement vehicles on a superload, depending on the load, the route and the time of day. Follow the issued permit. Building moves: notify the Washington State Patrol 48 hours ahead; the region may require you to hire the State Patrol for traffic control.

    Pilot car equipment

    A car, van or two-axle truck up to 16,000 lb with a body 60–102″ wide, not towing a trailer, equipped with: At least one flashing or rotating amber light or strobe above the roof, visible 360° and from 500′; headlights on while escorting. An OVERSIZE LOAD roof sign at least 5′ wide and 10″ high, black 8″ letters on yellow, shown only while escorting. An OVERSIZE LOAD roof sign at least 5′ wide and 10″ high, black letters at least 8″ high on yellow, shown only while escorting. 18″ STOP/SLOW paddle, three reflective triangles, a 5-lb B,C fire extinguisher, first-aid kit and a flashlight with red cone. High-visibility Class 2/3 garment and hard hat when working outside the car.

    Pilot car operator certification

    Pilot car operators must be certified and carry the card while escorting: 8-hour initial course or 4-hour recertification course from a WSDOT-approved provider. Written test with at least an 80% score. Washington cards are renewed every three years. For-hire operators carry commercial auto insurance of $100,000/$300,000 bodily injury and $50,000 property damage.

    Out-of-state pilot cards

    Operators licensed outside Washington may use a certification from a state WSDOT recognizes: Arizona, Colorado, Georgia, Minnesota, North Carolina, Oklahoma, Utah, Virginia.

    Extra pilot car triggers

    These add pilot cars beyond the size bands: Over 12′ wide on a multilane highway and tall enough to need a front pole car: add a rear pilot car. Rear overhang (from the rear axle) more than one-third of trailer-plus-load length: rear pilot car on two-lane highways. Driver can't see 200′ behind along both sides in the mirrors: rear pilot car on all highways. WSDOT can add pilot cars whenever it decides public safety needs them.

    Riding flag person

    For the over-105′ and over-125′ length triggers and the long-rear-overhang trigger, the permit may allow a certified riding flag person instead of a pilot car. The flag person may ride in the truck with the carrier's OK.

    No convoys without approval

    Loads that need pilot cars may not travel in convoy unless WSDOT specifically authorizes it, and one pilot car may not escort two loads at once unless the permit says so. Farm implement convoys are allowed with pilot cars front and rear and 500′ between implements.

    On any oversize move

    On two-lane roads, a front projection over 20 ft measured from the front steer axle requires a front escort. A rear projection measured from the rear axle exceeding one-third of trailer-and-load length requires a rear escort. These axle-based distances differ from projection beyond the vehicle. On any road, a rear escort is required if mirrors do not provide a 200-ft rear view along both sides. Existing positions may satisfy these conditions.

    Over 11′ wide

    Two-lane roads: 1 front and 1 rear pilot cars. Multi-lane undivided roads: no pilot car from these dimensional triggers. Divided highways: no pilot car from these dimensional triggers.

    Over 14′ wide

    Two-lane roads: 1 front and 1 rear pilot cars. Multi-lane undivided roads: 1 rear pilot car. Divided highways: 1 rear pilot car.

    Over 20′ wide

    Two-lane roads: 1 front and 1 rear pilot cars. Multi-lane undivided roads: 1 front and 1 rear pilot cars. Divided highways: 1 rear pilot car.

    Over 14′6″ high

    All road types: 1 front (height pole required) pilot car.

    Over 105′ long (trailer + load)

    Two-lane roads: 1 rear pilot car. Multi-lane undivided roads: no pilot car from these dimensional triggers. Divided highways: no pilot car from these dimensional triggers.

    Over 125′ long (trailer + load)

    All road types: 1 rear pilot car.

  6. 06Travel hours

    When can you move?

    At night only up to 12′ wide, 14′6″ high and 105′ long, unless the permit allows more.
    • Holiday, commuter and winter limits apply.

    Permitted oversize and overweight loads may be kept off state highways from noon the day before through New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day and the day after, and Christmas Day, except loads exempted by WAC 468-38-075. Fixed-date holidays are listed here; see the next list for Memorial Day, Labor Day and Thanksgiving.

    1. Dec ’2624Day before Christmas (from noon)
    2. Dec ’2625Christmas Day
    3. Dec ’2631Day before New Year's Day (from noon)
    4. Jan ’271New Year's Day
    5. Jul ’273Day before Independence Day (from noon)
    6. Jul ’274Independence Day
    7. Dec ’2724Day before Christmas (from noon)
    8. Dec ’2725Christmas Day
    9. Dec ’2731Day before New Year's Day (from noon)
    13WSDOT — Curfew hours & holiday restrictions · checked Oct 13, 2026
    The rule in full5 official sources

    Night travel

    Night travel is allowed up to 12′ wide, 14′6″ high and 105′ long, or more if WSDOT notes it on the permit. Curfew, holiday, winter and route limits still apply.

    Curfews and route conditions

    Above 12′ wide, 14′6″ high or 105′ long, night moves need WSDOT approval noted on the permit. Curfews and route conditions control.

    Current route restrictions

    Before leaving, check holiday curfews, commuter limits, mountain-pass and traction signs, construction, weather and local road postings.

    Night moves

    Loads within 12′ wide, 14′6″ high and 105′ long (legal overhangs included) may run at night. Bigger loads need "Nighttime movement approved" on the permit. Night is half an hour after sunset to half an hour before sunrise. Night moves still follow commuter curfews. The vehicle and load need lighting that meets 49 CFR 393.11.

    Commuter curfews

    Loads that must show OVERSIZE LOAD signs stay off the listed state-route segments during posted weekday rush hours. Areas: Seattle–Everett, Tacoma, Olympia, Vancouver, Kelso and Spokane. Hours vary by segment and fall between 6 and 9 a.m. and between 3 and 7 p.m. Width-only loads not over the segment's width limit (9′ to 11′2″) are exempt. Overweight alone does not trigger the curfew unless the truck can't keep up with traffic.

    Winter traction signs

    Permitted moves are banned where these signs are up: TRACTION ADVISORY OVERSIZE VEHICLES PROHIBITED, VEHICLES OVER 10,000 GVWR CHAINS REQUIRED, or ALL VEHICLES CHAINS REQUIRED EXCEPT ALL-WHEEL DRIVE, except for loads exempted by WAC 468-38-075.

    Low visibility and storms

    Permitted moves must not be made when visibility is 1,000′ or less; if it drops en route, clear the highway at the nearest safe location. Oversize loads stop at the nearest safe location when snow, fog or rain limits visibility to less than 1,000′, right after a severe storm while plows are working, or when compact snow and ice require chains. Do not resume until conditions have abated and the nearest WSDOT or State Patrol office gives clearance.

    Exempt overlength and overweight-only

    These permitted loads skip OVERSIZE LOAD signs, commuter and holiday curfews, the night-approval notation and the traction-advisory ban (chain laws still apply): Single trailer up to 56′ or doubles up to 68′, load included. Non-divisible load plus trailer up to 61′. Front overhang no more than 4′ past the 3′ legal limit and/or rear overhang up to 15′. Single-unit fixed load up to 45′ overall. Overweight-only loads at legal size that can keep the posted speed.

    Holiday restrictions

    Permitted oversize and overweight loads may be kept off state highways from noon the day before through New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day and the day after, and Christmas Day, except loads exempted by WAC 468-38-075. Fixed-date holidays are listed here; see the next list for Memorial Day, Labor Day and Thanksgiving. Day before Christmas (from noon) (Dec 24, 2026), Christmas Day (Dec 25, 2026), Day before New Year's Day (from noon) (Dec 31, 2026), New Year's Day (Jan 1, 2027), Day before Independence Day (from noon) (Jul 3, 2027), Independence Day (Jul 4, 2027), Day before Christmas (from noon) (Dec 24, 2027), Christmas Day (Dec 25, 2027), Day before New Year's Day (from noon) (Dec 31, 2027).

    Memorial Day, Labor Day and Thanksgiving

    WSDOT names these restricted holidays without dates. RCW 1.16.050 sets them as the last Monday of May, the first Monday in September and the fourth Thursday in November; WSDOT's restriction starts at noon the day before and, for Thanksgiving, runs through the day after. Day before Thanksgiving Day (from noon) (Nov 25, 2026), Thanksgiving Day (Nov 26, 2026), Day after Thanksgiving (Nov 27, 2026), Day before Memorial Day (from noon) (May 30, 2027), Memorial Day (May 31, 2027), Day before Labor Day (from noon) (Sep 5, 2027), Labor Day (Sep 6, 2027), Day before Thanksgiving Day (from noon) (Nov 24, 2027), Thanksgiving Day (Nov 25, 2027), Day after Thanksgiving (Nov 26, 2027).

  7. 07Flags & lamps

    Signs, flags and lights

    OVERSIZE LOAD signs7′ × 18″ · 10″ letters

    Mount OVERSIZE LOAD signs front and rear of the hauling vehicle, clear of lights and plates, and remove or retract them when not hauling the oversize load.

    • At least 7′ wide and 18″ high
    • Black letters at least 10″ high on yellow
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    Flags and lights on the load4 corners · ends of overhangs

    Flag all four corners of an overwidth load and the ends of every projection or overhang; after dark, put lights at each flag point.

    • Flags per RCW 46.37.140: red or orange fluorescent, at least 18 inches square
    • If the towed vehicle is more than 15′ behind the tow vehicle, hang an 18-inch white flag mid-span
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    The rule in full2 official sources

    Signs, lights and securement

    Use the required 7-foot signs and lights on projecting loads. Escorts need lights and signs. Secure the load, follow winter rules, and meet every traffic-control condition on the permit.

    OVERSIZE LOAD signs

    Mount OVERSIZE LOAD signs front and rear of the hauling vehicle, clear of lights and plates, and remove or retract them when not hauling the oversize load. At least 7′ wide and 18″ high. Black letters at least 10″ high on yellow.

    Flags and lights on the load

    Flag all four corners of an overwidth load and the ends of every projection or overhang; after dark, put lights at each flag point. Flags per RCW 46.37.140: red or orange fluorescent, at least 18 inches square. If the towed vehicle is more than 15′ behind the tow vehicle, hang an 18-inch white flag mid-span.

  8. 08Driver paperwork

    What the driver carries

    • Carry the permitCarry a readable printed or e-signed copy of the permit.
    • Paperwork must matchThe driver's papers must match the vehicle, load, permit type, route, dates, dimensions, axle and tire data, local approvals, traffic-control plan and special attachments.
    • Carrying the permitKeep the signed permit, or a signed copy, in the power unit while the permit is in effect.
    • Liability insuranceBy signing the permit, the applicant confirms the move carries at least $750,000 liability insurance ($300,000 for a noncommercial move) and that the vehicles and drivers are properly licensed.
    Carrying the permitPaper or e-signed copy

    Keep the signed permit, or a signed copy, in the power unit while the permit is in effect. An electronic copy is accepted when:

    • It can be verified by law enforcement in WSDOT's eSNOOPI system
    • Routed permits are shown on a screen at least 3½″ × 5″; the display is legible or can zoom
    • The officer may take the device to inspect the permit
    • Pilot car operators on a routed single-trip move also carry a copy of the permit with all conditions and attachments
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    Liability insurance$750,000 commercial

    By signing the permit, the applicant confirms the move carries at least $750,000 liability insurance ($300,000 for a noncommercial move) and that the vehicles and drivers are properly licensed.

    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    The rule in full3 official sources

    Carry the permit

    Carry a readable printed or e-signed copy of the permit. Trip and fuel permits must be printed and signed. Local and route attachments still apply.

    Paperwork must match

    The driver's papers must match the vehicle, load, permit type, route, dates, dimensions, axle and tire data, local approvals, traffic-control plan and special attachments.

    Carrying the permit

    Keep the signed permit, or a signed copy, in the power unit while the permit is in effect. An electronic copy is accepted when: It can be verified by law enforcement in WSDOT's eSNOOPI system. Routed permits are shown on a screen at least 3½″ × 5″; the display is legible or can zoom. The officer may take the device to inspect the permit. Pilot car operators on a routed single-trip move also carry a copy of the permit with all conditions and attachments.

    Liability insurance

    By signing the permit, the applicant confirms the move carries at least $750,000 liability insurance ($300,000 for a noncommercial move) and that the vehicles and drivers are properly licensed.

  9. 09Special permits

    Special loads and permit programs

    • Non-divisible loads up to 14′ wide
    • 15′ high and 125′ long
    • Depending on the combination
    Manufactured housing16′ box · 18′ with eaves

    Manufactured homes moving on their own axles follow their own limits:

    • Box width up to 16′; overall width with eaves never over 18′
    • Length up to 75′ including tongue (up to 80′ by individual approval)
    • Annual/monthly permits only for dealers, manufacturers and licensed transporters, up to 14′ box plus 12″ eave and 15′ high
    • Over 16′ wide or 16′ high: superload review
    • County treasurer decal on the rear of each unit; two flashing amber lights on the rear of the unit and two above the tow vehicle's roofline
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    Monthly and annual permits14′ W · 15′ H · 125′ L

    Dimension-only monthly or annual permits cover non-divisible loads up to 14′ wide, 15′ high and 125′ long, depending on the combination.

    • Single trailer up to 56′ or doubles up to 68′ for divisible loads
    • Empty apple bins and ranchers' own hay up to 15′ high
    • Fixed-load overweight permits for 3- or 4-axle single units
    5WSDOT — Permit types & fees · checked Oct 13, 2026
    Cranes and fixed loadsPermit to RCW 46.44.091 limits

    A crane, as a single-unit fixed-load vehicle, may run over legal weight on a special permit but must stay within the RCW 46.44.091 permit limits.

    • Tire loading: the lesser of 600 lb per inch of tire width or the tire maker's rating
    • Boom trailer or boom dolly only when the boom is attached, to meet weight requirements
    • No exemption from posted or load-restricted bridges and roads
    • Concrete pumper trucks and well drilling trucks follow the same permit weight rule
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    Farm implementsUnder 20′ wide · under 65,000 lb

    Farmers and businesses that sell, repair or maintain farm implements can get a farm implement permit, in 3-month periods up to a year, for non-divisible implements under 65,000 lb and less than 20′ wide.

    • Self-propelled implements (or a tractor pulling up to two) need the permit when over 14′ high or 16′ wide
    • Implements may not exceed 16′ high (14′ in Whatcom, Skagit, Island, Snohomish and King counties)
    • Two-lane highways: one pilot car in front and one behind over 12′6″ wide
    • Notify affected WSDOT maintenance areas at least 8 hours before moving over 16′ wide
    • Over 10′ wide or 14′ high: OVERSIZE LOAD signs and curfew rules; over 10′ wide in daylight: 18-inch red flags
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    House and building movesOver 16′ two-lane · 5-mile limit

    Buildings over 16′ wide on two-lane roads, or over 20′ on barrier-divided multilane roads, need regional WSDOT approval.

    • Apply on DOT Form 720-028 at least 10 working days ahead
    • Limited to 5 miles unless the region grants an exemption
    • Notify the State Patrol 48 hours ahead; top speed 25 mph; traffic delays no more than 5 minutes
    6Chapter 468-38 WAC — Vehicle size and weight (full chapter) · checked Oct 13, 2026
    The rule in full3 official sources

    Special permits

    Heavy-haul sealed containers, manufactured and mobile homes, logging, farm implements, tow trucks, milk doubles and emergency programs each have their own routes, sizes and fees.

    Manufactured housing

    Manufactured homes moving on their own axles follow their own limits: Box width up to 16′; overall width with eaves never over 18′. Length up to 75′ including tongue (up to 80′ by individual approval). Annual/monthly permits only for dealers, manufacturers and licensed transporters, up to 14′ box plus 12″ eave and 15′ high. Over 16′ wide or 16′ high: superload review. County treasurer decal on the rear of each unit; two flashing amber lights on the rear of the unit and two above the tow vehicle's roofline.

    Monthly and annual permits

    Dimension-only monthly or annual permits cover non-divisible loads up to 14′ wide, 15′ high and 125′ long, depending on the combination. Single trailer up to 56′ or doubles up to 68′ for divisible loads. Empty apple bins and ranchers' own hay up to 15′ high. Fixed-load overweight permits for 3- or 4-axle single units.

    Cranes and fixed loads

    A crane, as a single-unit fixed-load vehicle, may run over legal weight on a special permit but must stay within the RCW 46.44.091 permit limits. Tire loading: the lesser of 600 lb per inch of tire width or the tire maker's rating. Boom trailer or boom dolly only when the boom is attached, to meet weight requirements. No exemption from posted or load-restricted bridges and roads. Concrete pumper trucks and well drilling trucks follow the same permit weight rule.

    Farm implements

    Farmers and businesses that sell, repair or maintain farm implements can get a farm implement permit, in 3-month periods up to a year, for non-divisible implements under 65,000 lb and less than 20′ wide. Self-propelled implements (or a tractor pulling up to two) need the permit when over 14′ high or 16′ wide. Implements may not exceed 16′ high (14′ in Whatcom, Skagit, Island, Snohomish and King counties). Two-lane highways: one pilot car in front and one behind over 12′6″ wide. Notify affected WSDOT maintenance areas at least 8 hours before moving over 16′ wide. Over 10′ wide or 14′ high: OVERSIZE LOAD signs and curfew rules; over 10′ wide in daylight: 18-inch red flags.

    House and building moves

    Buildings over 16′ wide on two-lane roads, or over 20′ on barrier-divided multilane roads, need regional WSDOT approval. Apply on DOT Form 720-028 at least 10 working days ahead. Limited to 5 miles unless the region grants an exemption. Notify the State Patrol 48 hours ahead; top speed 25 mph; traffic delays no more than 5 minutes.

Price your Washington loadAgency fees and pilot-car needs for your loaded rig. Free, no contact details.Open worksheet

WA / Permit worksheet

Price your Washington movement.

Enter the complete loaded vehicle. Get estimated agency fees and escort requirements before sharing your contact details.

Crossing state lines? Estimate the whole trip
Single-trip · nondivisible loadOther permits & charges
Start with an example

Example loaded measurements are filled in. Adjust the equipment, mileage and registration to match your movement.

01

Loaded dimensions

Measure ground to highest point, widest point, and the full tractor–trailer–load length. These are not cargo-only dimensions.

Width
Height
Overall length
02

Equipment & registration

Trailer length
Trailer + load length
Axle weights, overhangs & movement details Optional
Front overhang
Enter 0 when there is no overhang.
Rear overhang
Enter 0 when there is no overhang.

Actual axle groups

Some weight fees depend on axle loads and spacing. Enter measured groups in travel order; do not divide gross weight evenly.

No ODPermit fee or markup. No contact details required.

Your estimate

The numbers behind your next move.

Your result will show the agency fee breakdown, potential pilot-car requirements, and the rules used to calculate them.

  1. 01 State agency fee subtotal
  2. 02 Escort & survey considerations
  3. 03 Sources & pricing assumptions

Single-state pricing uses the mileage you enter. For a proposed route and intermediate states, use the route calculator.

Agency fees only. Annual permits, specialized products and conditional services have separate terms.See the fee reference
About the example equipment

The samples use ODPermit’s editable 48 ft flatbed · 5 axles planning profile. Loaded dimensions, gross weight, 100 state miles and Washington registration are example inputs, not a capacity rating or a route approval. Replace them with your actual setup.

Great Dane Freedom flatbed brochure — Drop-deck option: 20–26 in drop from the upper deck with a 40–34 in rear deck height, which gives the 60 in upper-deck planning height. Platform length, combined tare and tractor geometry are editable ODPermit assumptions.

BEFORE THE TRUCK ROLLS

Turn the estimate
into a permitted move.

Confirm the loaded measurements, carrier details, travel dates and exact pickup and delivery. We can help coordinate permits, escorts and route surveys around those facts.

Request permit help

THE SOURCE RECORD

Official references.

Read the rule behind each requirement. These are dated references; current restrictions and the issued permit control your move.

  1. 01
    Washington State Commercial Vehicle Guide M 30-39.10

    Chapter 4, Legal Dimensions · Page 4

    Source record:
  2. 02
    WSDOT — Washington State Commercial Vehicle Guide M 30-39.10 (July 2025)

    Chapter 4: Legal Dimensions; Legal Weights; Overweight Loads (RCW 46.44.091); Use of County Roads or City Streets; Appendix 3 Axle Weight Table

    Source record:
  3. 03
    WSDOT — Commercial vehicle permits

    Determine if you need a permit (legal dimensions); Self-issued permits that require approval; Permits not available to self-issue

    Source record:
  4. 04
    Chapter 46.44 RCW — Size, Weight, Load

    RCW 46.44.091

    Source record:
  5. 05
    WSDOT — Permit types & fees

    Farm implement; Monthly/Annual Permit (Non-Divisible Load); Additional permits and information

    Source record:
  6. 06
    Chapter 468-38 WAC — Vehicle size and weight (full chapter)

    WAC 468-38-050, -070, -075, -095, -100, -120, -155, -175, -270, -290, -360, -405

    Source record:
  7. 07
    WSDOT — Superloads

    Superload definition; steps to receive a permit; Request for Approval of Superload Movement

    Source record:
  8. 08
    RCW 46.44.092 — Special permits—Overall width limits

    Width limits outside cities and towns by highway type

    Source record:
All 16 references
  1. 09
    WSDOT — Self-issue a permit

    Self-issued size and weight permit limits for single trip permits

    Source record:
  2. 10
    RCW 46.44.0941 — overweight mileage fees and whole-dollar rounding

    RCW 46.44.0941 — overweight mileage fees and whole-dollar rounding

    Source record:
  3. 11
    WSDOT — Pilot & escort vehicle

    Rules & regulations; Partner certification

    Source record:
  4. 12
    Washington WAC 468-38-100 — pilot/escort requirements

    Washington WAC 468-38-100 — pilot/escort requirements

    Source record:
  5. 13
    WSDOT — Curfew hours & holiday restrictions

    Holiday restrictions; Nighttime movements; Winter road restrictions; Commuter curfew hours table

    Source record:
  6. 14
    RCW 1.16.050 — Legal holidays

    Subsection (1)(e), (h) and (j): Memorial Day, Labor Day and Thanksgiving Day; subsection (5) weekend observance

    Source record:
  7. 15
    23 CFR 658 Appendix B — National Network semitrailer lengths

    Appendix B; 23 CFR 658.13(a)

    Source record:
  8. 16
    23 CFR 658.17 — Interstate gross, axle and bridge weights

    23 CFR 658.17(a)–(e); grandfather exceptions are configuration-specific

    Source record:
How ODPermit uses official sources

ACROSS THE STATE LINE

Keep the whole trip in view.

All state guides