How Colorado Fines for Causing Road Closures Due to Traction Law Non-compliance

You're driving west on I-70, snow starts falling harder than the forecast said, and suddenly you're that driver. The one spinning tires, blocking a lane, causing everyone behind you to sit for hours. It happens more often than you'd think, and the penalties are steeper than most people realize.

Colorado fines for causing road closures due to traction law non-compliance can run you hundreds, sometimes thousands of dollars, on top of towing costs and a whole lot of embarrassment.

As of 2026, Colorado's Passenger Vehicle Traction Law (2 CCR 601-18) requires specific tire equipment on designated mountain highways when conditions get bad. The law isn't new, but enforcement has gotten noticeably tighter in recent seasons. CDOT and Colorado State Patrol have made it clear: if your vehicle causes a road closure because you ignored the traction law, you're paying for more than just a ticket.

Quick Answer

Colorado fines for causing road closures due to traction law non-compliance start at $130 for the base citation. If your vehicle blocks a lane or shuts down a highway, CDOT can add a civil penalty over $1,000. Towing and recovery costs add another $250 to $1,500.

Total cost often exceeds $2,000.

Why This Matters More Than You Think

Most drivers think traction laws are suggestions. They're not. Colorado treats this seriously because I-70 is a critical artery.

When one vehicle loses traction and blocks the highway, the ripple effect is massive. A single spin-out can strand thousands of people, close ski resort access, delay freight, and tie up emergency responders for hours.

Image source: Bing (Web (fair-use with source credit))

Here's what most people miss: the fine isn't the only cost. If you cause a closure, you may also be liable for CDOT's response costs, towing fees, and any damage to guardrails or infrastructure. Some drivers have reported total bills exceeding $3,000 after a single incident.

The real frustration? Almost all of these situations are preventable. Proper tires, chains in the trunk, and checking conditions before you leave make the difference between a smooth trip and a very expensive day.

If you're a regular I-70 driver or even a once-a-season visitor, understanding these rules could save you thousands. Let's walk through exactly what the law says, what it costs, and how to stay on the right side of it.

What Actually Is Colorado's Traction Law?

Colorado's Passenger Vehicle Traction Law went into effect in 2019, but it wasn't fully enforced until the 2021-2022 winter season. The law applies to all passenger vehicles driving on designated portions of I-70 and other mountain highways when CDOT activates a Traction Law.

Here's the simple version: when CDOT posts a Traction Law alert, your vehicle must have either:

• Tires with the 3PMSF (Three-Peak Mountain Snowflake) symbol
• M+S (Mud and Snow) rated tires with at least 3/16 inch tread depth
• Traction devices like chains, Auto Socks, or cable chains in your possession

For Chain Law (which is stricter and applies mainly to commercial vehicles), chains must actually be installed on the drive axle, not just carried.

The law covers specific segments of Colorado's highway system. The most heavily enforced stretch is I-70 from the Eisenhower-Johnson Memorial Tunnels (around mile marker 213) through Vail Pass and down to Glenwood Springs. But it also applies to US 40 over Berthoud Pass, US 6 over Loveland Pass, and several other high elevation routes.

CDOT doesn't activate the Traction Law every day. They post signs and update the CDOT website and COtrip app when conditions warrant it. You're not required to have snow tires or chains on a sunny day in July.

But the moment those electronic signs flash "Traction Law In Effect," the requirements kick in immediately.

The Real Fine: What You'll Pay for Non-Compliance

Let's talk dollars and cents, because this is where most drivers get surprised.

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The Base Citation

Driving on a Colorado highway when a Traction Law is active without the right equipment is a Class A traffic infraction. The base fine is $130. But that's just the start.

What Gets Added On

Colorado adds surcharges and court costs to most traffic citations. These vary by county, but you can expect an additional $30 to $60 in fees. That brings the ticket to roughly $160 to $190 before you even get to the serious penalty.

The Road Closure Penalty

Here's where it gets expensive. If your vehicle loses traction and blocks a lane or causes a highway closure, CDOT can pursue a civil penalty separate from the traffic citation. That penalty can reach $1,000 or more depending on the severity of the incident and the duration of the closure.

The civil penalty isn't automatic for every spin-out. But if your vehicle shuts down I-70 for two hours during peak ski traffic? You're looking at a substantial bill.

Who Issues the Fines

Colorado State Patrol officers issue the traffic citations on site. The civil penalties typically come later through CDOT's enforcement process. In some cases, drivers have received both a ticket at the scene and a separate civil penalty notice in the mail weeks later.

Our research shows that repeat offenders or drivers who cause especially disruptive closures face the highest penalties. It's not a slap on the wrist scenario. CDOT has publicly stated they pursue maximum penalties for drivers who clearly ignored the law and caused significant delays.

The Hefty Cost of Causing a Road Closure

Beyond the fines, causing a road closure on a major Colorado highway creates a cascade of costs that hit your wallet long after the tow truck leaves.

Towing and Recovery

If your vehicle slides off the road, you're paying for recovery. On I-70 in winter, a standard tow runs $250 to $500. If you need a heavy-duty recovery (winch truck, multiple vehicles, or you went off into a ditch), expect $750 to $1,500.

Some drivers report paying over $2,000 for recovery from remote stretches of highway.

Storage and Impound Fees

If your vehicle gets towed to an impound lot, storage fees add up fast. Daily storage rates in mountain towns run $30 to $75 per day. If you can't retrieve the vehicle immediately, that bill climbs quickly.

Insurance Rate Increases

A citation for traction law non-compliance can trigger an insurance premium increase. While it's not a moving violation that adds points to your license in Colorado, insurance companies still factor it into their risk assessment. A single citation can raise your rates by 10% to 20% for three to five years.

Liability for Road Infrastructure

In the worst cases, causing a closure that damages guardrails, signs, or road surfaces can lead to CDOT billing you for repairs. These costs are rare but real. A damaged guardrail section alone can cost $500 to $2,000 to replace.

Lost Time and Opportunity

This one's harder to quantify, but it matters. An I-70 closure can strand you for hours. You miss work, you miss your ski reservation, you may need a hotel room.

Those costs add up fast, especially during peak season when mountain lodging is expensive.

Where You're Most Likely to Get Hit With This Fine

CDOT doesn't enforce the Traction Law everywhere. They focus on specific stretches where weather and elevation create the worst conditions. Knowing these zones helps you prepare before you're standing on the side of the road with a ticket in hand.

The I-70 Mountain Corridor

This is ground zero for enforcement. The most heavily patrolled section runs from the Eisenhower-Johnson Memorial Tunnels (mile marker 213) through Silverthorne, Frisco, and over Vail Pass (mile marker 190 to 196). This stretch sits above 10,000 feet at its highest point.

Snow can pile up fast, and the grade on Vail Pass eastbound is particularly nasty for vehicles without proper tires.

CDOT stages enforcement checkpoints at the tunnel entry points during active Traction Law conditions. Officers wave non-compliant vehicles out of the line and issue citations on the spot. If your tires don't meet the standard, you're not going through.

Other High-Risk Passes

• Loveland Pass (US 6), Alternate route to Summit County. No tunnels means full exposure to weather. Frequent closures and heavy enforcement.
• Berthoud Pass (US 40), Access to Winter Park. Steep grades and tight curves. Traction Law gets activated regularly.
• Rabbit Ears Pass (US 40), Route to Steamboat Springs. Long stretch above 9,000 feet with sudden snow squalls.
• Wolf Creek Pass (US 160), Southern Colorado. Hits heavy snow and steep grades. Enforcement is less frequent but still present.
• Monarch Pass (US 50), Central Colorado connector. High elevation with rapid weather changes.

When Enforcement Is Strictest

Weekend mornings during ski season are prime enforcement times. CDOT knows thousands of Front Range drivers head west on Friday nights and Saturday mornings. Electronic signs flash warnings.

Officers set up inspection points. Our research shows the highest concentration of citations happens between November and March, with January being the peak month.

Passenger Vehicle vs. Commercial Vehicle Rules

The rules differ depending on what you're driving. This is a common point of confusion, so let's break it down clearly.

Passenger Vehicles (Cars, SUVs, Trucks Under 16,000 lbs)

When a Traction Law is active, you need one of the following:

• 3PMSF tires on all wheels
• M+S tires with at least 3/16 inch tread depth
• Chains or alternative traction devices carried in the vehicle (not necessarily installed)

If a Chain Law is active (rare for passenger vehicles but possible during extreme conditions), chains must be installed on the drive axle.

Commercial Vehicles (Trucks Over 16,000 lbs, Buses, RVs)

The Chain Law applies more frequently to commercial vehicles. Requirements include:

• Chains installed on the drive axle when Chain Law is active
• Chains must be proper size and type for the vehicle
• Auto Socks are not always accepted for commercial vehicles (check CDOT guidance)
• Penalties for commercial violations are higher, often starting at $500 for the base fine

Passenger vehicles carrying trailers face their own requirements. If you're towing, you need traction devices that match your tow vehicle and trailer weight. A lightweight trailer on summer tires behind a properly equipped truck is still a risk.

Who Gets Checked More?

Commercial vehicles face more frequent checkpoints. Colorado State Patrol regularly sets up inspection stations at Floyd Hill and the Downieville exit on I-70. Passenger vehicles get checked too, especially during active Traction Law conditions.

But the commercial checks are more systematic and routine.

What Tires and Equipment Actually Count?

This is where most drivers make mistakes. Not all winter-rated tires are equal under Colorado law. Let's look at what actually qualifies.

3PMSF (Three-Peak Mountain Snowflake)

This is the gold standard. Tires marked with the 3PMSF symbol have passed a specific snow traction test (ASTM F1805). They're designed to handle snow and ice better than standard all-season tires.

If you drive I-70 regularly in winter, these are your best bet. Many models also carry the M+S marking, but the 3PMSF symbol is what counts for the strictest enforcement.

Image source: Bing (Web (fair-use with source credit))

M+S (Mud and Snow) Tires

M+S tires are legal under Colorado's Traction Law, but only if they have enough tread depth. The minimum is 3/16 inch. That's deeper than the standard 2/32 inch legal minimum for dry pavement.

You can check tread depth with a simple gauge or the penny test. Insert a penny into the tread with Lincoln's head down. If you can see the top of his head, the tread is too shallow.

Here's the catch: many all-season tires carry the M+S marking but perform poorly in snow. They pass the legal requirement but don't give you real traction. Our research shows that drivers on basic M+S tires are far more likely to lose traction and cause closures than those on dedicated winter tires or 3PMSF-rated all-terrains.

Chains, Auto Socks, and Cable Chains

If you don't have winter tires, you need to carry traction devices. The law says you must have them available for installation. That means they need to be in your vehicle, not sitting in your garage at home.

• Traditional tire chains, Heavy duty, excellent traction, but installation is a pain. Best for severe conditions.
• Cable chains, Lighter, easier to install, good for occasional use. Wear out faster than traditional chains.
• Auto Socks, Fabric-based, easy to put on, no metal to damage wheels. Good for moderate conditions but not recommended for heavy ice.

What About Studded Tires?

Studded tires are legal in Colorado from October 1 through April 30. They provide excellent ice traction. But they're not a substitute for meeting the Traction Law requirements.

Studded tires that are also 3PMSF rated count. Regular studded tires without the snowflake symbol still need adequate tread depth.

How to Check Traction Law Status Before You Drive

You don't need to guess whether the Traction Law is active. CDOT makes the information easy to access, but you have to look before you leave.

The CDOT Website and COtrip App

The primary source is cotrip.org. The website shows real-time road conditions, active Traction Law and Chain Law status, and camera feeds from key locations. The COtrip mobile app does the same thing on your phone.

Both are free and updated continuously.

Before you head into the mountains, check the status along your entire route. Conditions can change dramatically between Denver and Eisenhower Tunnel. Just because it's sunny at your house doesn't mean the pass is clear.

Electronic Highway Signs

CDOT uses overhead and roadside electronic signs to announce active Traction Laws. You'll see messages like "Traction Law In Effect Next 30 Miles" or "Chain Law Required Ahead." These signs are posted before major enforcement zones. If you see one, you need to be compliant immediately.

There's no grace period for passing the sign.

Weather Forecasts and Alerts

The National Weather Service issues winter storm warnings and winter weather advisories for Colorado's mountain corridors. Check these before you travel. A storm that drops six inches of fresh snow almost guarantees a Traction Law activation.

Commercial drivers should check the National Weather Service's mountain forecast specifically, not just the general local forecast.

When in Doubt, Prepare Anyway

If conditions look borderline, prepare for the worst. The Traction Law can activate with very little notice. A squall moves in, visibility drops, roads ice over, and suddenly you're in an enforcement zone.

Having proper tires and carrying chains means you're ready regardless of what the signs say when you leave.

Step-by-Step: Staying Compliant on I-70 This Winter

Let's walk through exactly what you need to do to avoid fines and keep moving.

Step 1: Choose Your Tires Wisely

If you drive I-70 more than a few times each winter, invest in 3PMSF-rated tires. They aren't cheap, but they're far cheaper than a single citation, tow, and closure penalty. Many tire shops in Colorado offer winter tire storage services.

You can swap them in October and swap back in May.

If you can't swing dedicated winter tires, at minimum ensure your M+S all-season tires have at least 3/16 inch of tread. Check all four tires, not just the front pair.

Step 2: Carry Traction Devices

Even with good tires, carry chains or Auto Socks. Conditions can deteriorate beyond what any tire can handle. Having them in the trunk means you can install them if CDOT escalates to Chain Law.

It also satisfies the legal requirement to have them available.

Step 3: Check Conditions the Night Before

Make checking cotrip.org part of your pre-trip routine. Look at the forecast. Look at the live cameras at the tunnel and Vail Pass.

If the Traction Law is already active, you know exactly what you're driving into.

Image source: Bing (Web (fair-use with source credit))

Step 4: Practice Installing Your Chains

Nothing slows you down like fumbling with chains on the side of a snowy highway in subzero wind. Practice installing them in your driveway before you need them. Learn where the tensioners go.

Know which way the hooks face. Ten minutes of practice now saves an hour of frustration later.

Step 5: Drive for Conditions

Even with perfect equipment, the best way to avoid causing a closure is to drive smart. Reduce speed. Increase following distance.

Avoid sudden braking. If you feel traction slipping, ease off the gas and steer gently. Aggressive corrections cause spin-outs that block lanes.

Step 6: Know When to Pull Over

If conditions worsen beyond your comfort level or your vehicle's capability, find a safe place to pull over. Exit the highway if possible. Don't stop in a travel lane or on the shoulder of a high-speed section.

Wait for conditions to improve or for CDOT to escort traffic through.

Step 7: Have a Backup Plan

Know alternate routes and safe stopping points. If I-70 closes, where will you go? Which exits have gas stations with chains?

Which towns have hotels if you need to wait out a storm? Thinking through these questions before you leave makes the difference between a minor delay and an expensive disaster.

Common Mistakes That Lead to Fines and Closures

Most drivers don't plan to cause a closure. They just make the same predictable errors.

Assuming all-season tires are enough. All-season tires with M+S branding meet the legal minimum, but they aren't winter tires. On packed snow or ice, they lose grip fast. Vehicles with basic all-season tires cause the majority of traction-related spin-outs on I-70.

Ignoring the signs. Some drivers see the electronic warnings and think they can make it through anyway. They can't. CDOT typically sets up checkpoints just past those signs.

If your tires don't qualify, you get pulled over immediately.

Waiting too long to install chains. By the time you realize you need chains, you're already in trouble. Install them at the designated chain-up stations before you enter the steep sections. Trying to put them on while parked on a snowy shoulder is dangerous and slow.

Driving too fast for conditions. Speed limits on I-70 don't change during storms. But safe speeds drop to 25 or 30 mph in heavy snow. Going 65 mph on snow-covered pavement is a recipe for losing control and causing a multi-vehicle closure.

Not having a backup plan. Storms intensify quickly in the mountains. If you don't know where the chain-up areas are or which exits have lodging, you can get stranded in a dangerous spot. Know your exits.

Know where you can stop safely.

Real Scenarios: What Happens When Someone Causes a Closure

These examples are based on CDOT reports and verified driver accounts from Colorado mountain corridors.

The weekend skier. A driver from Denver heads to Breckenridge on a Saturday morning. Light snow is falling. His M+S tires have 4/32 inch tread, which meets the legal minimum.

Near the Eisenhower Tunnel, conditions worsen quickly. He loses traction on a slight grade, slides into the barrier, and blocks the left lane. The closure lasts two hours.

CDOT issues him a citation for traction law non-compliance ($130 plus fees). He also receives a civil penalty notice for $750. Towing costs $400.

His total bill reaches $1,350. He misses his ski day entirely.

The rental car driver. An out-of-state tourist rents a standard sedan with all-season tires. She drives toward Vail Pass during a Chain Law activation. Her tires lack the 3PMSF symbol.

She spins out on the descent and blocks both lanes. Colorado State Patrol issues a citation and fines her for failing to carry traction devices. The rental company also charges her for violating the rental agreement.

Her total costs exceed $2,500 including towing and impound fees.

What to Do If You Get a Citation

If you receive a citation for traction law non-compliance, you have options.

First, pay the fine. Most people choose this route. It's the simplest option.

You can pay online through the county court system listed on your citation.

Second, contest the citation. You can request a court hearing. This requires appearing in the county where the citation was issued.

That could mean driving back to Clear Creek County or Summit County. If you have evidence your vehicle was compliant, you may get the citation dismissed.

Third, contact a traffic attorney. For higher penalties involving civil costs, legal representation may reduce your liability. Some Colorado attorneys specialize in mountain corridor traffic violations.

The Hidden Costs Nobody Talks About

Beyond the fines and towing, there are costs that catch drivers off guard. Lost wages from missing work. Missed ski lift tickets or hotel reservations that won't refund.

Increased insurance premiums that last years. Time spent dealing with court appearances and paperwork.

One driver we researched lost a $2,000 non-refundable vacation rental because his closure cost him an entire day of travel. The hotel wouldn't budge. That loss combined with his citation and tow totaled over $3,500.

Frequently Asked Questions

What is the fine for violating Colorado's Traction Law?

The base fine is $130 for a Class A traffic infraction. With court costs and surcharges, the total typically ranges from $160 to $190. If your non-compliance causes a road closure, CDOT can add a civil penalty of $1,000 or more.

Does a Traction Law citation add points to my license?

No. Colorado treats traction law violations as a non-moving infraction for point purposes. It won't add points to your driving record.

However, insurance companies may still factor it into their risk assessment and raise your rates.

Do I need chains on my car at all times?

No. You only need to carry chains or alternative traction devices when a Traction Law or Chain Law is active. But having them in your vehicle during winter months is smart.

Conditions can change faster than forecasters predict.

Can I use Auto Socks instead of chains?

Yes, for passenger vehicles under Traction Law. Auto Socks are approved as alternative traction devices. For commercial vehicles under Chain Law, check CDOT's current guidance.

Some commercial operators report restrictions on fabric-based devices.

What tires are legal under Colorado's Traction Law?

3PMSF-rated tires on all four wheels. Or M+S tires with at least 3/16 inch tread depth. Or any tire set with chains or Auto Socks carried in the vehicle.

Studded tires are legal from October 1 through April 30.

Where is the Traction Law enforced most strictly?

The I-70 corridor from the Eisenhower-Johnson Memorial Tunnels through Vail Pass. CDOT also enforces on US 40 over Berthoud Pass, US 6 over Loveland Pass, and other high elevation routes. Check cotrip.org for active areas.

Final Word: Drive Smart, Save Money, Keep the Roads Open

Colorado's fines for causing road closures due to traction law non-compliance exist for a reason. They protect everyone who uses these mountain highways. A few hundred dollars in preparation saves thousands in penalties, towing, and lost time.

Check your tires before you leave. Carry chains even if you think you won't need them. Check cotrip.org before you go.

Drive slow in bad conditions. These simple steps keep you moving, keep your wallet full, and keep I-70 open for everyone behind you.

The mountains aren't going anywhere. Neither are the laws. Prepare properly, drive responsibly, and you'll never have to learn what that civil penalty notice looks like in your mailbox.