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Superload Permit Calculator
Is your load a superload? Enter dimensions and weight to determine thresholds by state — including engineering review requirements, police escort rules, and permit lead times.
Check Your Load
Interactive engine launching Q2 2026. For complex superloads contact us: superload@haulcommand.com
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What Is a Superload?
Width Threshold
16"“18+ ft
Most states trigger superload status at 16"“18 feet wide. Standard oversize max is typically 14"“16 ft.
Height Threshold
15.5"“17+ ft
Vehicle height above 15.5"“16 ft typically triggers superload classification in most states.
Weight Threshold
150k"“200k+ lbs
Gross vehicle weight above 150,000"“200,000 lbs typically requires superload engineering review.
Superload Thresholds by State
| State | Width | Height | GVW | Police Escort | Engineering Review | Notes |
|---|---|---|---|---|---|---|
| TX | 18' | 16' | 254,300 | Required ≥18ft wide or ≥16ft tall | Required ≥180k lbs or ≥16ft ht | TX DOT Oversize Permit Office manages superload routing. |
| CA | 16' | 15.5' | 250,000 | Required ≥16ft wide | Required ≥200k lbs | Caltrans issues separate SA (Special Authorization) permits. |
| FL | 18' | 16' | 200,000 | Required ≥18ft wide | Required ≥200k lbs | FDOT requires 10-day notice for superloads. |
| OH | 16' | 15' | 200,000 | Required ≥16ft wide | Required ≥150k lbs | OH uses bespoke route analysis for superloads. |
| WA | 18' | 16' | 200,000 | Required ≥18ft wide | Required ≥166k lbs | WSDOT requires engineering study for novel routes. |
| LA | 18' | 16' | 200,000 | Required ≥18ft wide | Required ≥200k lbs | LA DOTD coordinates with parish governments. |
| AZ | 18' | 16' | 200,000 | Required ≥16ft wide | Required ≥160k lbs | ADOT issues superload permits from Phoenix HQ only. |
| PA | 16' | 15' | 200,000 | Required ≥16ft wide | Required ≥200k lbs | PennDOT requires pre-move conference for superloads. |
| MT | 18' | 17' | 200,000 | Required ≥20ft wide | Required ≥200k lbs | MT MDT allows wider loads due to low traffic density. |
| ND | 20' | 18' | 200,000 | Discretionary | Required ≥200k lbs | ND allows very wide loads on many rural corridors. |
Reference Q1 2026. Confidence: partially_verified. Always confirm with state DOT before dispatch.
Superload FAQs
What is a superload?+
A superload is any load that exceeds standard oversize permit thresholds — typically over 16 feet wide, 16 feet tall, or over 200,000 lbs. Exact thresholds vary by state. Superloads require special permits, engineering reviews, police escorts, and often advance agencies coordination.
How long does a superload permit take?+
Superload permits typically take 5"“15 business days. Engineering reviews, bridge surveys, and police escort coordination all add time. Some states offer expedited processing for an additional fee.
Do superloads always need a police escort?+
Most states require police escorts for loads exceeding 16"“18 feet wide. Requirements also apply after certain hours, on specific road types, or when bridges require traffic control. Requirements vary significantly by state.
What is an engineering review for a superload?+
A certified analysis by a licensed PE that evaluates whether bridges and roads along the planned route can safely support the load. Required by most states for loads exceeding 150,000"“200,000 lbs. Typically costs $500"“$5,000 per state.
Can I get a superload permit online?+
Very few states allow online superload permit filing due to the complexity of routing and engineering requirements. Most require direct coordination with the state DOT permit office.