Trucking Regulations in Oregon
Complete guide to weight limits, speed limits, permits, chain laws, and special rules for commercial truck drivers operating in Oregon.
Max Gross Weight
80,000 lbs (105,500 lbs on some state routes with permit)
Truck Speed Limit
65 mph on interstates
Diesel Tax
$0.40 per gallon diesel + weight-mile tax (no fuel tax for trucks over 26,000 lbs, replaced by weight-mile tax)
Weight & Size Limits in Oregon
| Measurement | Limit |
|---|---|
| Max Gross Vehicle Weight | 80,000 lbs (105,500 lbs on some state routes with permit) |
| Max Axle Weight | 20,000 lbs single axle, 34,000 lbs tandem |
| Max Trailer Length | 60 ft trailer on state routes, 53 ft on interstates |
| Max Width | 102 inches |
| Max Height | 14 ft |
Speed Limits for Trucks in Oregon
Rural Interstate
65 mph (trucks), 70 mph cars
Urban Interstate
55 mph
Truck-Specific
65 mph on interstates
Fuel Tax & Tolls in Oregon
Diesel Fuel Tax
$0.40 per gallon diesel + weight-mile tax (no fuel tax for trucks over 26,000 lbs, replaced by weight-mile tax)
Toll Roads & Bridges
No toll roads currently (I-205 tolling project under development). Oregon has no sales tax.
Chain Laws & Weather Requirements
Mandatory chain carry from November 1 to March 31. ODOT traction tire and chain requirements on mountain passes (I-84 Columbia Gorge, US-26 Mt. Hood, I-5 Siskiyou Pass).
Oversize & Overweight Permits
ODOT Motor Carrier Transportation Division. Permits available online. Cascade Range crossings have strict routing.
Port of Entry & Weigh Stations
Weigh stations on I-5, I-84, I-82, and US-97. Oregon also checks weight-mile tax credentials at weigh stations.
Special Rules for Oregon
Hazmat Route Restrictions
Hazmat restricted through Portland downtown and on the Vista Ridge Tunnel (US-26). Designated routes through Salem and Eugene. Specific hazmat routing around Columbia River Gorge.
Rest Area & Parking Rules
Rest areas allow 12-hour parking. Oregon has good rest area coverage. Anti-idling law: 5-minute limit in Portland metro (DEQ regulation).
DOT Inspection Frequency
High. Oregon State Police motor carrier division is active. Weight-mile tax compliance is heavily enforced at weigh stations.
Looking for Trucking Jobs in Oregon?
Browse CDL driver positions and connect with carriers operating in Oregon.
Frequently Asked Questions About Oregon Trucking Regulations
What is Oregon's weight-mile tax?
Oregon replaces the diesel fuel tax with a weight-mile tax for trucks over 26,000 lbs GVWR. The tax rate varies by weight bracket and is calculated based on miles driven in Oregon. Carriers must file quarterly returns and can track miles electronically. The tax ranges from approximately $0.05 to $0.25+ per mile depending on weight.
What is the truck speed limit in Oregon?
Oregon has a 65 mph truck speed limit on rural interstates while passenger vehicles can travel 70 mph. Urban interstates are 55 mph. The 5 mph differential is enforced.
Are chains required in Oregon?
Oregon requires trucks to carry chains from November 1 through March 31. ODOT can require chain-up on mountain passes including I-84 through the Columbia River Gorge, US-26 over Mt. Hood, and I-5 over Siskiyou Pass. Fines for not carrying chains during the mandatory period start at $250.
How does Oregon's weight-mile tax compare to fuel tax?
Oregon's weight-mile tax replaces the diesel fuel tax entirely for qualifying trucks. For efficient operations, the weight-mile tax can be comparable to or slightly higher than traditional fuel taxes. The advantage is that Oregon has no sales tax, so other purchases in the state are cheaper.
What are the mountain pass concerns in Oregon?
Oregon's Cascade Range crossings (US-26 Mt. Hood, US-20 Santiam Pass, US-97) and I-5 over Siskiyou Pass present significant challenges including steep grades, tight curves, and severe winter weather. I-84 through the Columbia River Gorge can have ice storms and high winds. ODOT provides real-time pass conditions at TripCheck.com.