Fast, reliable & cost effective Equipment Transport

Navigating mountain roads during colder months presents unique challenges for drivers. We understand the risks of icy conditions and shifting weather patterns that impact both commercial and passenger vehicles.

From September through May, certain routes require traction devices to maintain control. Critical highways like I-70 enforce these regulations to prevent accidents and keep traffic moving smoothly.

Our team specializes in heavy equipment transport, ensuring full compliance with seasonal mandates. Violations can lead to steep fines, especially if disabled vehicles obstruct roadways. Proper preparation is essential for safe winter travel.

Different vehicles have specific requirements. Understanding these distinctions helps avoid penalties while prioritizing everyone’s well-being on hazardous routes.

Understanding Colorado’s Snow Securement Rules

Winter travel demands preparation, especially when facing unpredictable mountain conditions. The traction law and chain law are critical tools to maintain safety. These state mandates activate based on real-time weather conditions.

How Are These Laws Activated?

Electronic signs on highways and alerts via COTrip.org notify drivers when requirements take effect. The traction law typically starts September 1 through May 31 on routes like I-70. It ensures vehicles have winter tires or approved traction devices.

Traction Law vs. Chain Law

The traction law requires minimum 3/16” tread depth or alternative devices. In contrast, the chain law is stricter—mandating chains on all tires when conditions worsen. It’s often a final step before road closures.

We clarify the distinctions to help drivers comply. Commercial vehicles face expanded chain requirements in 2024. Enforcement by state patrol treats violations as secondary offenses.

These laws apply year-round on all state highways. Staying informed ensures safer journeys during sudden storms.

Vehicle-Specific Traction Requirements

Traction requirements vary significantly based on vehicle type and weight. We break down the standards for each category to ensure compliance and safety.

Passenger Vehicles: AWD, 2WD, and Tire Standards

Two-wheel-drive (2WD) vehicles under 16,001 lbs must use chains, approved traction devices (ATDs), or mud+snow (M+S) tires with 3/16” tread depth on I-70. All-wheel-drive (AWD) rigs need either M+S or mountain snowflake-rated tires.

Commercial Vehicles: Chains and Weight Class Rules

Rigs over 16,000 lbs GVWR must carry chains September 1–May 31. New 2024 rules mandate chains on tandem axles for straight trucks and buses. Hotshot trucks follow different standards than full CMVs.

• Prohibited: Single-link chains on drive axles.
• Required: Two chains/ATDs for school buses.

RVs and Buses: Special Considerations

Recreational vehicles follow passenger vehicle rules, but we recommend snowflake tires for high-risk routes like Million Dollar Highway. School buses need ATDs on at least two wheels.

Approved Traction Devices: Chains vs. Alternatives

Choosing the right traction device can make or break your winter driving experience. We compare traditional chains with modern solutions like AutoSock to help you stay compliant and safe.

Traditional Snow Chains: Pros and Cons

Metal chains excel in deep snow but demand careful installation. Their rugged durability suits severe routes like mountain passes. However, they risk damaging alloy wheels and hydraulic lines on auto transporters.

Chains also require significant clearance. Vibrations and noise levels often exceed 70dB, which may affect long-haul comfort.

AutoSock and Textile Snow Socks: Benefits and Limitations

Snow socks offer a lighter alternative. These 3mm textile devices meet EN16662-1:2020 standards, tested for 120km on dry asphalt. They protect alloy wheels and reduce noise to

Installation takes 50% less space than chains. However, they wear out faster on bare pavement. We recommend them for short-term use or vehicles with limited clearance.

How to Choose the Right Device for Your Vehicle

Consider these factors:

• Route severity: Chains for icy grades; snow socks for light snow.
• Tire compatibility: Verify CDOT approval for cables (≥0.415” diameter) or sanders.
• Vehicle type: Avoid chains on low-clearance rigs.

For mixed conditions, AutoSock balances traction and convenience. Always check manufacturer guidelines before purchase.

Legal Penalties for Non-Compliance

Ignoring traction laws can lead to serious financial and legal consequences. We clarify penalty structures to help drivers avoid costly mistakes. State patrol issues fines based on vehicle class and violation severity.

Fine Structures by Vehicle Type

Passenger vehicles face a $130 base fine plus a $17 surcharge per violation. Commercial rigs incur steeper penalties—$500 plus a $79 surcharge. Blocking traffic escalates costs to $1,000+.

Hidden Costs of Violations

Fines are just the start. Tow fees average $300–$800 in mountain zones. Insurance premiums may rise 20% after a chain law violation. In 2023, CDOT issued 2,347 citations—proof of strict enforcement.

• Secondary enforcement: Officers prioritize accidents but still ticket improper equipment.
• Court appearances: Mandatory for violations during road closures.
• Liability risks: Multi-vehicle crashes often fault the driver without chains.

We recommend checking tires and carrying approved devices. A single citation can cost more than premium winter tires.

Critical Routes and Seasonal Restrictions

Drivers must be aware of high-risk areas where traction laws are strictly enforced. These roads often experience sudden weather shifts, requiring immediate compliance to avoid closures or fines.

I-70 Corridor: Mandatory Traction Dates

The I-70 corridor enforces chain laws from September 1 to May 31 between Morrison (MP 259) and the Utah border. Commercial vehicles must carry chains regardless of weather, especially on steep grades like Vail Pass.

We recommend checking COTrip plow cams for real-time updates. Closures typically last 72 hours during heavy storms.

High-Risk Mountain Passes

Routes like Berthoud Pass average 12 annual closures due to traction failures. Compare elevation challenges:

Other critical highways include:

• US 550 (Million Dollar Highway): Permanent chain stations at MP 72–90.
• CO-9 Frisco-Fairplay: September–May traction mandates.
• Monarch Pass: Advance alerts via CDOT text system.

Under Colorado chain law, CMVs face unique rules on US 160/285. Always monitor winter conditions before departure.

Winter Driving Tips for Colorado Roads

Vehicle readiness and smart driving techniques make all the difference on icy passes. We share professional strategies to help drivers navigate challenging conditions while maintaining safety and compliance.

Pre-Trip Vehicle Checks

Essential inspections before mountain travel:

• Battery power: Verify 600+ cold cranking amps (CCA) for reliable starts
• Fluids: Use washer fluid rated to -25°F to prevent freezing
• Tire inspection: Check tires mud snow for minimum 3/16″ tread depth

Pack a 72-hour emergency kit with:

• Digital tire pressure gauge
• Traction mats
• LED flares

Handling Steep Grades and Ice

Advanced techniques for mountain driving:

• Compression braking: Downshift before 7% grades to avoid brake fade
• Chain installation: Maintain proper tension for 35mph maximum speeds
• ABS activation: Apply steady pressure rather than pumping brakes

For commercial vehicles:

• Use CB Channel 19 for real-time weather updates
• Practice brake feathering on long descents

Monitoring CDOT Alerts and Signage

Colorado’s chain law uses color-coded alerts:

Best resources for winter driving updates:

• COTrip Mobile App (real-time camera views)
• 511 phone hotline for voice reports
• Electronic highway signs with Code alerts

We recommend checking conditions hourly during storms. Proper preparation reduces risks for all drivers sharing the road.

Stay Safe and Compliant This Winter

Late-season storms demand extra vigilance on mountain routes. Commercial drivers must equip chains by September 1, but spring weather remains unpredictable. March and April often bring sudden blizzards, catching unprepared travelers off guard.

Download CDOT’s free traction law fact sheet for quick reference. It outlines approved traction devices and critical deadlines. We also offer fleet safety inspections to ensure your vehicles meet all standards.

Blocking traffic during enforcement periods risks penalties up to $1,157. Proactive winter preparation saves time and money. Let us help you ensure safety and compliance during every trip.