When winter weather moves in, the right equipment — and the confidence to use it — makes all the difference. After more than 16 years of helping keep professional drivers informed, educated, and safe, I'm here with a guide to help you understand tire chain laws, stay compliant, and make confident, safe decisions when winter weather hits.
Whether you love them, hate them, or have never touched a set before, tire chains are an important part of winter driving. In some places, carrying or using them is also required by law.
Every state handles tire chain laws a little differently, and every trucking company sets its own policies, too. Some carriers expect drivers to chain up in winter conditions to keep freight moving. Others, like Anderson Trucking Service (ATS), encourage drivers to get off the road and park somewhere safe when conditions become too dangerous.
That's why truck drivers need to understand both the laws along their route and their carrier's policy before winter weather arrives.
What Truck Drivers Should Know About Tire Chain Laws
There is no single nationwide tire chain law for commercial trucks. Requirements are set at the state level, and can vary based on vehicle weight, highway, weather conditions, and posted chain controls.
Some states require commercial drivers to carry chains during certain months or on designated routes. Others require chains only when road conditions worsen or chain-control signs are posted.
- Tire chain laws vary by state, route, and vehicle type.
- A requirement to carry chains does not always mean you have to use them.
- Some states require chains on trailers as well as drive axles.
- Not every state accepts the same alternative traction devices.
- Chains are meant for slow, short-distance travel in winter conditions.
- Drivers should know how to install chains correctly before they need them.
- Always check current state DOT requirements and road conditions before traveling through winter weather.
- Your safety matters more than any delivery.
What Are Tire Chains?
Tire chains are metal traction devices that wrap around your truck's tires to help maintain traction on snowy or icy roads.
They're designed for slow, short-distance travel. When chains are installed, drivers should reduce their speed and follow the chain manufacturer's guidance and any posted restrictions. Some transportation agencies, including the Oregon Department of Transportation, advise drivers not to exceed 30 mph with chains installed.
Even when installed correctly, driving with tire chains can make for a rough ride. If a chain comes loose or breaks, it can damage tires, equipment, or other parts of the truck.
Putting chains on can also create its own safety risks. Designated chain-up areas may be crowded, icy, or close to moving traffic. That's another reason drivers should know how to install their chains before they're standing outside in bad weather trying to figure it out for the first time.
Which States Require Truck Drivers to Carry Tire Chains?
Some states require commercial drivers to carry tire chains during certain dates or on designated routes, while others require chains only when weather conditions or posted chain controls call for them.
For example, Washington requires vehicles over a Gross Vehicle Weight Rating (GVWR) of 10,000 pounds to carry chains on designated routes from Nov. 1 through April 1. Colorado also has seasonal chain-carry requirements for commercial motor vehicles on designated highways.
Other states, including California and Oregon, use posted chain controls to tell drivers when chains or approved traction devices must be carried or installed.
Because these rules can depend on the road, vehicle configuration, and current conditions, drivers should always check the appropriate state DOT before entering an area affected by winter weather.
Is Carrying Tire Chains the Same as Chaining Up?
No. A requirement to carry tire chains does not necessarily mean you have to install them.
Some states require commercial drivers to keep a certain number of chains in the truck during a set season or while traveling on designated routes. Drivers may only need to install them when chain controls are active or signs require their use. Think of it this way:
- Carry requirement: You must have the required chains with you.
- Chain-up requirement: You must install the required chains before continuing.
- Chains permitted: You may use chains when road or weather conditions call for them.
Always follow posted signs, current road restrictions, and instructions from state transportation or law enforcement officials.
Semi-Truck Tire Chain Laws by State
Tire chain laws are set at the state level, so requirements can change as you cross state lines. They can also depend on vehicle weight, axle configuration, whether you're pulling a trailer, and current road conditions.
Here are some of the requirements truck drivers are most likely to encounter in major winter-driving states.
California
California uses three levels of chain control:
- R-1: Chains or traction devices are required on most vehicles, with limited exceptions based on vehicle type and approved snow tires.
- R-2: Chains are required on all vehicles except qualifying four-wheel-drive vehicles under 6,500 pounds that have snow tires on all four wheels. Those vehicles must still carry chains.
- R-3: Chains are required on all vehicles with no exceptions.
Commercial trucks have additional chain-placement requirements. Trucks towing trailers may also be required to place chains on the trailer.
Drivers should follow posted chain-control signs and instructions from Caltrans or California Highway Patrol personnel.
Check current California truck chain requirements from Caltrans.
Colorado
Colorado requires commercial motor vehicle drivers covered by the state's Must Carry Law to carry chains from Sept. 1 through May 31 on designated highways.
The current law applies to commercial vehicles with a combined weight of more than 16,000 pounds used in commerce or to transport at least 16 passengers, including the driver. Drivers must also use chains when Colorado's commercial vehicle chain law is in effect.
Because the requirements apply to specific routes and conditions, commercial drivers should check current Colorado Department of Transportation information before entering mountain routes.
Review Colorado's current commercial vehicle Must Carry Law.
Montana
Montana may require chains when chain-up signs or winter travel restrictions are posted. Because conditions can change quickly in mountain areas, drivers should check current road conditions and restrictions before travel.
Nevada
Nevada may require vehicles, including commercial vehicles, to use chains or approved traction devices when chain restrictions are posted. Drivers should pay close attention to vehicle-weight requirements and current road restrictions.
Oregon
Oregon's chain law applies statewide, and commercial vehicles face specific requirements based on vehicle weight and configuration.
Drivers may see signs requiring them to carry chains or traction tires or requiring chains to be installed. When chains are required, the number and placement can depend on the truck's GVWR, drive-axle configuration, and whether it's pulling a trailer.
For vehicles over 10,000 pounds GVWR, Oregon has specific commercial-vehicle chain-placement requirements. The state may also impose stricter requirements during severe winter conditions.
Review Oregon's commercial vehicle chain and traction tire requirements.
Utah
Utah may require chains or other approved traction devices when road conditions or posted restrictions call for them. Drivers should check current requirements before traveling through affected mountain routes.
Washington
Washington requires vehicles over 10,000 pounds GVWR to carry tire chains on designated routes from Nov. 1 through April 1, regardless of current road conditions or advisories.
Vehicles over 10,000 pounds must also carry at least two extra chains in case road conditions worsen, or chains break or become unusable. Chain-placement requirements depend on the vehicle's axle and trailer configuration.
Review Washington's chain requirements for vehicles over 10,000 pounds.
What About Other States?
Many other states permit or require tire chains when snow, ice, or other weather conditions make them necessary. Some also limit when studded tires or other traction devices can be used. Requirements can change, and a law that applies to a passenger vehicle may not apply the same way to a commercial truck.
Before traveling through winter weather, check the current chain laws and road restrictions from the transportation department for each state on your route.
Disclaimer: This article provides a general overview of tire chain laws in the United States and is not a substitute for current state regulations. Laws, posted restrictions, and chain-control requirements can change. Always check official state transportation resources before travel.
What Types of Tire Chains and Traction Devices Can Truck Drivers Use?
When winter roads get slick, drivers have several options for improving traction. But there's an important catch: not every state treats every traction device the same way.
- Single chains: Fit over one tire and are commonly used on commercial trucks.
- Dual chains: Cover a dual-wheel set. They're heavier and take longer to install, but provide additional traction.
- Cables: Similar to traditional chains, but lighter and easier to handle. They may not be accepted everywhere traditional chains are required.
- Tire or snow socks: Fabric traction devices that fit over the tire tread. They're easier to install, but not every state accepts them as a substitute for chains.
- Studded tires: Winter tires with small metal studs embedded in the tread. Many states restrict when they can be used.
The right option depends on your truck, the state you're traveling through, and the current chain restriction.
Before relying on an alternative traction device, make sure the state you're traveling through recognizes it.
How Do You Know When It's Time to Chain Up or Park?
A chain law tells you what you're legally required to do, but it doesn't make the safety decision for you. Weather, visibility, traffic, road conditions, and your own comfort level all matter. Conditions can also change quickly, especially through mountain passes.
Before entering winter weather:
- Check current road and weather conditions.
- Know the chain requirements for the states and routes ahead.
- Make sure you have the correct number and size of chains.
- Inspect your chains for broken hooks, worn links, or other damage.
- Know how to install them before you need them.
- Pay attention to chain-control signs and road closures.
- Never continue driving simply because you feel pressured to make a delivery.
Does ATS Require Truck Drivers to Use Tire Chains?
No. ATS does not require its drivers to chain up and continue driving when road conditions become unsafe. If conditions deteriorate to the point that you don't feel safe continuing, we encourage you to let your driver manager know and park in a safe location until conditions improve.
It boils down to this:
No load is worth risking your life.
However, ATS's safety policy and state tire chain laws are two different things. Drivers still need to carry required equipment and comply with applicable laws, posted restrictions, and chain-control requirements while operating on public roads.
Frequently Asked Questions About Semi-Truck Tire Chains
Do Semi-Trucks Have to Carry Tire Chains?
It depends on the state, route, and time of year. Some states require commercial vehicles to carry chains during specific dates or on designated highways. Others require chains only when winter conditions or posted restrictions call for them.
Always check the current requirements for every state on your route.
Which States Require Truck Drivers to Carry Chains?
Several states have commercial-vehicle chain requirements, particularly in western and mountain regions. Colorado and Washington have notable seasonal carry requirements, while states such as California and Oregon use chain-control systems that can require commercial drivers to carry or install chains based on road conditions.
Requirements vary, so there is no single rule that applies nationwide.
Is There a Federal Tire Chain Law for Truck Drivers?
There is no single federal tire chain law that sets one chain requirement for commercial trucks nationwide. Tire chain requirements are generally established and enforced at the state level.
That means an OTR driver may encounter different requirements as they cross state lines.
How Many Tire Chains Does a Semi-Truck Need?
There isn't one number that applies everywhere. The number of chains required can depend on the state, truck weight, axle configuration, road restriction, and whether you're pulling a trailer.
For example, Washington requires vehicles over 10,000 pounds to carry at least two extra chains in addition to the chains needed for the vehicle's configuration.
Check the requirements for the states on your route before traveling.
Do Semi-Truck Trailers Need Tire Chains?
They can. Some states require chains on certain trailer axles when chain controls are active.
California and Oregon, for example, have requirements that can apply to trailers as well as the truck itself.
How Fast Should You Drive a Semi-Truck With Tire Chains?
Drive slowly and follow the chain manufacturer's instructions and any posted speed restrictions. Oregon DOT advises drivers not to exceed 30 mph while using chains.
Accelerate and brake gradually, and stop somewhere safe if a chain comes loose or breaks.
Does ATS Require Drivers to Chain Up?
No. ATS does not require drivers to chain up and continue through conditions they consider unsafe. Drivers are encouraged to communicate with their driver manager and park somewhere safe until conditions improve.
Drivers must still follow applicable state chain laws and equipment requirements.
Stay Safe and Check Chain Requirements Before You Drive
Winter weather is part of life on the road, especially for OTR drivers traveling through the Upper Midwest, Mountain West, and Pacific Northwest.
Knowing the law is important, but preparation goes beyond compliance. Check the forecast. Check road conditions. Know what's required along your route. Make sure your equipment is ready. And know how to install your chains before you're standing outside in the snow trying to learn.
Even if your carrier doesn't require you to chain up and keep moving, understanding tire chains and the laws surrounding them can help you make safer, more informed decisions when winter weather hits.
And remember: Conditions can change faster than any article can be updated. Always check current state DOT chain restrictions and road conditions before heading into winter weather.
Learn how professional truck drivers can plan ahead for changing road and weather conditions.
Regulatory information last reviewed: September 2026.