Colorado oversize permit office
Colorado Department of Transportation (CDOT), Office of Freight Mobility & Safety - Oversize/Overweight Permit Office. Call 303-757-9539 (Toll Free: 1-800-350-3765), 7:30 a.m. to 4:30 p.m. Monday through Friday Mountain time.
From Colorado's own pages, checked 2026-10-24. Fees and rules change: the state's page is the last word.
- How to get one
- Apply and pay online in COOPR before you enter Colorado or move the load; many permits are self-issued without a permit technician.
- Single trip fee
- Single trip OS Permit: $30; Single trip OW Permit: $30 plus $10 per axle; Single trip OSOW Permit: $30 plus $10 per axle ($15 permit fee, or $15 plus $5 per axle, doubled by the Senate Bill 09-108 surcharge). Credit card fee: $4 per transaction per permit.Source
- Legal without a permit
- Width 8'6" · Height 14 foot 6 inches · Length No overall length requirement for truck tractor semitrailer combinations as long as the trailer does not exceed 57 feet 4 inches; combinations limited to 70 feet · Weight 80,000 pounds combined gross vehicle weight (GVW) on Interstate and 85,000 pounds on Non-Interstate highwaysSource
- Superloads
- Loads between 200,000 and 500,000 pounds need a Chapter 6 Special permit ($250); over 500,000 pounds, or a double dolly more than 15 feet wide, is a Superload ($800).Source
- How fast
- Single trip permits have a two-hour turnaround; applications after 3 p.m. (MT) may wait until the next business day. Chapter 6 Specials take three to five business days, and currently up to two to three weeks.Source
When you can move
- Daylight
- Daylight means sunrise to sunset; daylight escort rules follow the colour of the highway on CDOT's Pilot Escort and Oversize Restriction Map.Source
- At night
- At night (sunset to sunrise) loads up to 12 ft wide need flashing yellow lights, 12 to 14 ft also need an escort, and over 14 ft may not move without a Chapter 6 special permit.
- Weekends
- No general weekend ban; on I-70 between Morrison (exit 259) and West Vail (exit 173): Dec 1-Mar 31 no westbound Fri 3-8 p.m. or Sat-Sun 7 a.m.-noon, no eastbound Sat-Sun 3-9 p.m.; May 15-Sep 15 no westbound Fri from 4 p.m. (5 p.m. at Idaho Springs) to 8 p.m. or Sat 8 a.m.-noon, no eastbound Sun 3-9 p.m.
- Holidays
- Memorial Day, Independence Day, Labor Day. No oversize moves 6 a.m.-9 p.m. on the holiday, and noon-9 p.m. on the Friday before Memorial Day and Labor Day; if Independence Day is on a Saturday also noon-9 p.m. the Friday before, if on a Sunday noon-9 p.m. the Monday after. Next datesSource
- Rush-hour curfews
- 7 in Colorado, such as Denver area (I-25 Exit 200-223, I-70 Exit 266-282, I-76, SH 88/287 Federal, SH 95 Sheridan, SH 391 Kipling, SH 6 6th Ave, SH 121 Wadsworth, US 36, US 285 Hampden, I-225, I-270): Mon-Fri 6-9 a.m. and 3-6 p.m. All of them