Oregon Truck Weight Limits

How much a truck can weigh in Oregon

The Interstate limit is 80,000 pounds. Off the Interstate you can run a divisible load up to 105,500 pounds with an Extended Weight Permit on ODOT-approved routes, usually needing 7 or 8 axles. There's no free tolerance - an ounce over is a violation (ORS 818.430). Go 5,000-plus pounds over and you're paying 15 to 24 cents a pound.

Axles, off-Interstate, and permits

• Off the Interstate: 80,000 lb base; up to 105,500 lb for divisible loads with an ODOT Extended Weight Permit on approved routes (typically 7-8 axles)
• Single axle: 20,000 lb
• Tandem axle: 34,000 lb
• With a permit: 105,500 lb Extended Weight Permit for divisible loads on ODOT-designated routes; heavier movements by variance/superload permit

Posted bridge and road limits

Oregon posts bridges and roads with MUTCD R12 signs; 'WEIGHT LIMIT X TONS' is short tons (2,000 lb), so 15 TONS = 30,000 lb. The posted number overrides the legal maximum - if a bridge is posted below your weight you cannot cross. Crossing a posted bridge over its limit is its own violation on top of any overweight fine, plus liability for damage to the structure.

What running heavy costs

ORS 818.430, no free tolerance. Schedule I (registered vehicle, no permit required): 0-1,000 over = $100; 1,001-2,000 = $150; 2,001-3,000 = $200; 3,001-5,000 = $300; 5,001-7,500 = 15 cents/lb; 7,501-10,000 = 16 cents/lb; 10,001-12,500 = 20 cents/lb; over 12,500 = 24 cents/lb. Operating without a required permit falls under the steeper Schedules II/III (base $200-$600 plus 10-30 cents/lb).

More for Oregon