OR state page · Last reviewed 2026-05-25
Oregon Truck Weight Limits and Permit Sources Oregon truck weight, ODOT commerce permit, and seasonal/special restriction reference with official source tracking.
This page is a reference aid, not legal advice. Weight rules, permits, routes,
and penalties can change without notice; use the linked official source as the
final authority.
At-a-glance summary Field Value Source Status Confidence Gross Federal Interstate gross limit is 80,000 lb; Oregon-specific limits are in the FHWA state law compilation linked here. inferred from official source medium Single axle Federal Interstate single-axle limit is 20,000 lb; Oregon-specific limits are in the FHWA state law compilation linked here. inferred from official source medium Tandem axle Federal Interstate tandem limit is 34,000 lb; Oregon-specific limits are in the FHWA state law compilation linked here. inferred from official source medium Bridge formula Federal bridge formula checks apply on Interstate routes; verify state exceptions and permit conditions before movement. inferred from official source medium Permit agency Oregon Department of Transportation confirmed high Seasonal / frost Oregon publishes over-dimension permit and restriction information through ODOT; no separate statewide frost-law figure was confirmed. needs review medium Fine source Official fine structure not confirmed in this review. No confirmed official source Needs official confirmation
not found in official review low
Field-level reference data Regular weight limits Gross vehicle weight limit Federal Interstate gross limit is 80,000 lb; Oregon-specific limits are in the FHWA state law compilation linked here. inferred from official source medium Single axle limit Federal Interstate single-axle limit is 20,000 lb; Oregon-specific limits are in the FHWA state law compilation linked here. inferred from official source medium Tandem axle limit Federal Interstate tandem limit is 34,000 lb; Oregon-specific limits are in the FHWA state law compilation linked here. inferred from official source medium Bridge formula applies Federal bridge formula checks apply on Interstate routes; verify state exceptions and permit conditions before movement. inferred from official source medium Interstate notes Use FHWA Interstate limits together with the state source and any permit conditions. inferred from official source medium Non-Interstate notes Use the reviewed state source and local postings for non-Interstate operation. inferred from official source medium
Axle and loading notes Steer axle notes Steer axle review should include axle law, tire/equipment ratings, registration, and route postings. inferred from official source medium Drive axle notes Drive axle groups should be checked against tandem/group limits and permit terms. inferred from official source medium Trailer tandem notes Trailer tandem position changes distribution and may affect spacing-sensitive checks; re-weigh after adjustment. inferred from official source medium Fifth wheel notes Fifth-wheel movement redistributes weight but does not create permit authority. inferred from official source medium Bridge law notes Check FHWA bridge formula and the state source when axle spacing is close to a limit. inferred from official source medium
Oversize / overweight permits Permit agency Oregon Department of Transportation confirmed high Permit office name ODOT Commerce and Compliance / Over-Dimension Permits confirmed high Official permit URL ODOT over-dimension permits page. confirmed high Online permit portal Use ODOT's official over-dimension permit source for current permit access. inferred from official source medium Permit contact Use ODOT Commerce and Compliance contacts from the official source. inferred from official source medium Permit notes Permit terms, route conditions, dates, and vehicle configuration should be checked on the official permit source before travel. inferred from official source medium
Seasonal and special restrictions Frost / seasonal restriction Oregon publishes over-dimension permit and restriction information through ODOT; no separate statewide frost-law figure was confirmed. needs review medium Seasonal weight notes Use ODOT permit and restriction materials for current route-level restrictions; a single statewide frost-law weight page was not confirmed in this review. needs review medium Official seasonal URL ODOT over-dimension permit and restriction source. needs review medium
Fines and enforcement Overweight fine structure Official fine structure not confirmed in this review. No confirmed official source Needs official confirmation
not found in official review low Overweight ticket notes Use the actual citation, current statute, and permit terms before estimating penalties. No confirmed official source Needs official confirmation
not found in official review low Enforcement agency Official enforcement agency page not confirmed in this review. No confirmed official source Needs official confirmation
not found in official review low Fine official URL No confirmed official source Needs official confirmation
not found in official review low CSA / safety notes CSA impact depends on inspection and reporting; use FMCSA SMS materials and the actual inspection record. inferred from official source medium
Scale notes Public scale notes A public scale ticket is a self-check record, not state permit authority. inferred from official source medium Weigh station / enforcement notes Compare scale readings with official limits, route postings, and any permit terms. inferred from official source medium CAT Scale disclaimer CAT Scale tickets are private self-check records and do not replace official permits or enforcement decisions. inferred from official source medium Scale ticket notes Use steer, drive, trailer, and gross readings to compare against official limits before travel. inferred from official source medium
Oregon’s oversize and overweight permit framework is administered by ODOT and is notable for the complexity of its route-specific restrictions — the Oregon OS/OW permit system assigns loads to specific approved routes, and deviating from permitted routes can result in enforcement action regardless of the load’s compliance with statutory weight limits. Coastal and Cascade Range routes carry restrictions related to road grade, shoulder width, and bridge capacity that do not appear in the standard weight table. Spring and seasonal restrictions on mountain passes and rural roads are part of ODOT’s permit authorization process rather than a separate notification system.
How to verify this yourself
Use ODOT over-dimension permit materials and current restrictions before moving over legal size or weight. Confirm the specific approved route before departure — Oregon’s route-specific permit terms are enforced separately from general weight compliance.
FAQ Where should I verify Oregon permit requirements? Use the official ODOT Commerce and Compliance / Over-Dimension Permits source linked on this page before moving over legal size or weight.
Are Oregon seasonal restrictions fully confirmed here? The linked official source should be checked for current seasonal, route, or permit restrictions.
Do these weight values cover Oregon non-Interstate roads and state highways? The values shown are the federal Interstate baseline. State-specific non-Interstate limits are in the FHWA state law compilation linked here and may differ from the baseline.