Understanding Key Oversize Rules on I-70 Through Mountain States
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We plan heavy equipment moves with a safety-first mindset. Our team follows the Mountain Rules program developed by the Colorado Department of Transportation and partners to teach mountain hazards and promote steady driving.
We start every project by checking applicable state permits and regulations. That step ensures your vehicle load moves legally and avoids costly delays.
We verify size and width in feet against bridge and tunnel limits. We map highways, traffic patterns, weather windows, and locations that affect travel time and overall movement.
We coordinate escort planning, lights, and signage so drivers stay focused on the road. We adjust schedules for holiday bans and peak traffic to protect timetable and assets.
Transparency matters. We share timing, routing, and permit status. For detailed curfew and permit examples, see our state curfew guide: state-specific curfew rules for oversize loads.
Safety-first trucking on Colorado’s I-70: mountain grades, traffic, and compliance support
We focus on safe, controlled travel through steep corridors to protect loads and crews.
The Mountain Rules program — developed by the Colorado Department of Transportation with the Colorado State Patrol, Colorado Motor Carriers Association, PrePass Safety Alliance, and Drivewyze — guides our training. We turn that guidance into clear actions for drivers and vehicle operators.
- Speed control, gear choice, and brake management keep a vehicle load steady on long downgrades.
- We set travel windows based on weather, wind, and traffic to meet hours and permit requirements.
- Staging areas and brake-check spots are planned in feet to fit your size and width limits.
- Drivers get briefings on lane discipline, following distance, and front and rear light visibility.
- Escort coordination and communications let drivers focus on terrain and highway congestion.
We confirm night and low-visibility plans, including proper lights setup for tunnels and steep grades. We also align permits and regulations early to prevent last-minute route changes.
Focus Area | Action | Measure | Benefit |
---|---|---|---|
Brake management | Gear selection & speed limits | Brake-check locations (feet) | Reduced wear and safer stops |
Weather windows | Route timing & holds | Travel windows (hours) | Fewer storm delays |
Escort support | Pilot coordination & lights | Escort present when required | Smoother traffic flow |
Permits | Early submission and checks | Permit & regulation review | Legal, uninterrupted travel |
For a detailed corridor study and background, see the Colorado report: Colorado corridor study.
Key Oversize Rules on I-70 Through Mountain States: legal dimensions, weight, lights, escorts, and holiday limits
Our crews verify every dimension and axle weight to keep moves compliant and safe.
Maximum legal dimensions and overhangs
We confirm height at 14 feet 6 inches and width at 8 feet 6 inches. Length depends on configuration: tractor-semitrailer trailers may be up to 57 feet 4 inches, self-propelled units 45 feet, and combinations limited to four units and 70 feet.
Front overhang must be 4 feet or less. Rear overhang must not exceed 10 feet. We add cluster lights to any overhang per the lighting plan.
Weight limits in pounds
Legal combined GVW is 80,000 pounds on interstates and 85,000 pounds on non-interstate highways. Single axle limit is 20,000 pounds. Tandem groups are 36,000 pounds on interstate and 40,000 pounds on secondary highways.
Night travel, lights, and escort placement
Hours of darkness equal sunset to sunrise. Widths over 8 feet 6 inches and up to 12 feet require one flashing yellow front light and two to three rear flashing yellow lights. If width exceeds 12 feet and is up to 14 feet, we assign a pilot in front for two-lane roads and a rear escort on four-lane roads.
Holiday restrictions and insurance
Extra-legal loads face bans between 6:00 a.m. and 9:00 p.m. on Memorial Day, Independence Day, and Labor Day. Additional noon-to-9 p.m. prohibitions apply around specific holiday Fridays and Mondays. Local segments near Cripple Creek have 3:00 p.m.–7:00 p.m. weekend restrictions.
When a vehicle load exceeds limits, manufactured homes must show public liability of at least $100,000 per person and $300,000 per crash. We file extra-legal permits via COOPR before entry.
Item | Limit | When | Action |
---|---|---|---|
Height | 14 ft 6 in | All highways | Verify clearance, plan route |
Width | 8 ft 6 in (legal); up to 14 ft with permits | Day/night rules vary | Assign lights/escort as required |
GVW | 80,000 / 85,000 pounds | Interstate / Non-interstate | Weigh axles, adjust config |
Holiday travel | 6:00 a.m.–9:00 p.m. bans; noon–9 p.m. extra windows | Memorial, Independence, Labor Day | Reschedule or obtain exemptions |
Learn regional considerations: See our guide to shipping in California and review South Dakota requirements for comparative permit practices.
Permits, routing, and escorts on the I-70 corridor and E-470: from application to movement
We file permits early and plan every move to match permit conditions, equipment limits, and traffic windows.
Permit timing and accuracy. We submit extra-legal permits before a vehicle enters the state via COOPR. Applications must include legal dimensions, trailer length in feet, and configuration details. For E-470 trips we prepare an Oversize/Overweight permit and can email bkemper@e-470.com for faster processing.
E-470 regulations. Peak-hour bans stop travel during 6–9 a.m. and 3–7 p.m. Vehicles that cannot hold 50 mph must move between 12 a.m. and 5 a.m. HAZMAT routing is managed with Colorado State Patrol Hazardous Materials Section at 303-273-1900.
Escorts, lights, and equipment. We assign an escort vehicle or pilot car for widths 12 feet and over. We coordinate front and rear lights, signs, and communications. Heavy construction equipment travels on a lowboy to reduce height and protect clearances.
Item | Requirement | When | Action |
---|---|---|---|
Permits | COOPR submission; Single Trip or OSL | Before entry | File with accurate legal dimensions |
GVW & axles | Axle-by-axle pounds & spacing | GVW > 80,000 lbs | Provide configuration, match bridge limits |
Speed & time | 50 mph min or night move | E-470 | Schedule 12 a.m.–5 a.m. if needed |
Escorts | Pilot for 12 ft+ width; lights front/rear | Wide loads | Deploy escort vehicle, set communications |
Ready to move heavy equipment on I-70? Get a compliant route, permit, and escort plan today
We coordinate permits, escorts, and routes so your load moves without surprises. We deliver a turnkey plan that lists exact dimensions in feet, verifies limits, and protects your schedule and safety.
We secure the right permit package and set up escort support. We confirm width, front, and rear visibility so your vehicle and truck clear the first inspection point.
We time travel to avoid holiday bans and noon-to-evening peaks. We monitor highways and adjust movement when weather or incidents demand changes.
For related documentation and state guidance, see our page about overweight vehicle requirements in Pennsylvania. We stand behind every move with experienced planners and escorts who keep your equipment moving safely.