2011 winter chain advisory
When the snow begins to fall, it's nice to know the laws regarding chain use before Smokey Bear shows up with lights flashing.

By Jami Jones, senior editor

The only thing worse than getting caught in a snowstorm and needing to throw iron, is not knowing if you're legal doing it.

Every year, we plow through the state laws and regulations of the lower 48 states and bring you a comprehensive roundup, delivered in Land Line's trusted plain-speak way, of all of the chain laws.

The online version of this article can be found on landlinemag.com and ooida.com with links to all of the state regulations and laws cited in this roundup. And, in case you don't want to keep your Land Line Magazine in your cab year round, we now offer the comprehensive chain law roundup on Android and Blackberry phone apps.

While every effort has been made to make sure this list is 100 percent complete, if you are in doubt at all, check with the state department of transportation or check in at the first scale house you come to. A few minutes of being safe is a lot better than being sorry with a few hundred dollars worth of fines later.



California does not require trucks to carry chains during any specified time period. When the weather hits, though, it takes at least eight chains for a standard tractor-trailer configuration to comply with the regulations.

Chains or cables?

Conventional tire chains and cable chains, as well as other less conventional devices such as "Spikes Spiders," are permitted. Trucks with cable-type chains are legal, but may be restricted at times because of severe conditions – which can happen commonly in the higher elevations.


Eight total. On the tractor, four chains must be on all four tires of the main drive axle. Two more chains are required on the outside tires of the second drive axle. You have options on the placement of the two more required chains on the trailer axles. Chains can be placed on the outside of either axle or staggered with one chain on the outside of each axle.

Remember, while inside tires of duals are not usually required to be chained, CalTrans can require chains on the inside duals if conditions are bad enough.

Route specific

Chains are most often required in the higher mountain passes of northern California, such as: Interstate 5 north of Redding;

  • Interstate 80 over Donner Pass between Sacramento and Reno, NV; and
  • U.S. Highway 50 over Echo Summit between Lake Tahoe and Sacramento.
  • Chains are also sometimes required on:
  • State Route 58 near Tehachapi between Bakersfield and Mojave;
  • Interstate 15 over Cajon Pass between Victorville and San Bernardino; and
  • Interstate 5 over Tejon Pass between Los Angeles and Bakersfield.

However, snow can fall unseasonably at higher elevations at many locations within California. Chains may be required at any time at these higher elevations when conditions warrant.



Colorado's chain law applies to every state highway, federal highway and interstate throughout the state. The chain law is in effect when drivers are notified by roadside signs. Truckers will need chains for the four tires of the drive axle to be in compliance when it's time to throw iron. There is no requirement to carry extra chains or cables.

The Colorado law changed a bit in 2007. Now, truckers traveling specifically on I-70 between mile marker 163 in Edwards County and mile marker 259 in Morrison County must carry sufficient chains to be in compliance from Sept. 1 through

May 31. If you get busted without chains on this stretch of road, you will be fined $50 plus a $17 surcharge.

And, if you violate Colorado's chain law, you'd better be ready to pay. You can be fined $500, plus a $157 surcharge, for not putting on chains when required. If you block the roadway because you didn't throw iron when the law was in effect, you can be dinged with a $1,000 fine, plus a $313 surcharge.

There are two levels of the chain law:

  • Level 1, Code 17 – Single drive axle, combination commercial vehicles must chain up all four drive tires. Cables are not allowed in this instance. All other commercial vehicles must have either snow tires or chains to proceed.
  • Level 2, Code 18 – Chains are required for all commercial vehicles. Again, all four tires of single-drive tractors must be chained. For dual-drive axle tractors, you're only required to chain four drive tires. Outside tires of drive axles must have chains. Inside tires may have cables.

Chains or cables?

  • Chains, as well as wheel sanders – which carry enough sand to negotiate a hill – and pneumatically driven chains are allowed. Cables are allowed in some scenarios – such as on trailers and on the inside tires of dual-drive axles.

The Colorado regulations actually give the Colorado Department of Transportation and the Highway Patrol the power to dictate when chain laws go into effect.



Here's another state that permits the use of tire chains "for safety because of snow, ice or other conditions tending to cause a vehicle to slide or skid."

The governor recently signed a bill into law that allows state officials to restrict travel on highways during emergency situations.three different levels of bans to choose from. A Level I ban encourages extreme caution when traveling roadways and advises that non-essential travel be avoided. A Level II ban permits travel only by emergency vehicles, essential government personnel, health care providers and vehicles carrying food and fuel. A Level III ban restricts travel to only emergency vehicles and essential employees such as snowplow operators. The Level III ban also prohibits retaliation by employers against employees complying with the travel ban.



Officials in Idaho can determine, at any time, that Lookout Pass or Fourth of July Pass on I-90 or Lolo Pass on Highway 12 are unsafe, either individually or as a group. If that happens, signs will alert you to chain up.

If the alert is in effect, you will have to chain up a minimum of one tire on each side of drive axles and one axle at or near the rear of each trailer.

On a side note, studs are prohibited between May 1 and Sept. 30.



There are no specific dates for the use of tire chains or how many must be used. However, the state is painstakingly specific about the type of chains that are permitted.

Here's the exact language from the Kentucky statute: "Where chains are used on rubber-tired vehicles, the cross chains shall be not more than three-fourths (3/4) of an inch in thickness or diameter, and shall be spaced not more than 10 inches apart, around the circumference of the tires."



The Maryland regulations can be a bit misleading. In one section of the regulations, the state has the boilerplate language permitting the use of snow chains.

However, elsewhere in the regs it is stated that chains may be required in Maryland if a snow emergency is declared. Snow emergencies can be declared for individual roads or statewide. Travel – other than for motorcycles – is prohibited on any highway that is designated and appropriately signposted as a vehicle emergency route … for which a snow emergency has been declared and is in effect, unless the vehicle is equipped with chains or snow tires on at least one wheel at each end of a driving axle.



Massachusetts prohibits the use of studded tires and chains between May 1 and Nov. 1 without a permit. The law does not specifically mention chains; however, the Massachusetts State Patrol confirmed the regulation applies the same way for chains. It should also be noted that commercial vehicles can be ordered off the roadways during "snow emergencies."



Chains, of "reasonable proportion," can be used for safety because of snow, ice or other conditions tending to cause a vehicle to skid. However, guidance provided by the state says that if chains are used, "the chain must not come in contact with the road."



There are no laws on the books mandating or prohibiting the use of chains when the roads are covered with snow or ice.



The chain law goes into effect when roadside signs tell all drivers to chain up. The state's requirement when the law is in effect is for all "driver wheels" to be chained up.



There aren't specific dates for chain laws to be in effect. Again, roadside signs will let you know when chaining up is required. In Nevada, truckers will need to chain at least two wheels on the main drive axle. You are also required to chain the "braking wheels of any trailing vehicle in a combination of vehicles."


New Jersey

New Jersey goes a little beyond the standard "chains are permitted when needed" directive. The state allows chains of reasonable proportions when roads, streets and highways are slippery, because of rain, snow, ice, oil, manner of construction or other reason.

However, "no chains shall be used at any time on improved highways when highway conditions do not make such use necessary for the safety of life or property." Also, New Jersey prohibits the use of chains "likely to be thrown so as to endanger any person or property."


New York

If New York officials, either state or local, post a route as a snow emergency route, all vehicles traveling on it will be required to have snow tires and/or chains. There are no specifics in the regs mandating the number of chains or placement.



Oregon's law applies to all highways in the state. Signs will tell you when you are required to carry chains and when you are required to use them. You will need to have six chains on hand to comply in Oregon.


Again, you have a few options for which tires you are required to chain on the tractor, so here goes:

  • A tandem-drive axle tractor must have chains on two tires on each side of the primary drive axle (in other words, all four tires of the main axle); or
  • If both axles are powered, one tire on each side of each drive axle (again, four chains total required; you just don't have to chain the inside tires).

Now on the trailer, here's the deal:

Chains must also be placed on two tires, one on each side, of any axle on the trailer. The chains can be both on the front axle, both on the rear axle or staggered with one outside tire on the front and the outside tire of the opposite rear axle.



Another emergency snow route state here. If officials declare a snow emergency route when the roadway is covered with ice or snow, only vehicles with snow tires or "tire chains on two tires on a driven axle" may proceed.


South Dakota

The South Dakota DOT has the authority to restrict travel on roads. Signs will alert you to these restrictions. Tire chains or "sufficient traction devices" are allowed. You don't have to wait for the signs to tell you to put on your chains. Chains are also permitted if conditions tending to cause a skid are present.



Tennessee sends mixed signals with its regulations. In one reg, it says that it is "permissible" to use snow chains when conditions warrant. However, elsewhere, the Volunteer State requires that every truck "likely to encounter" conditions requiring chains carry at least one set.

So to be safe, you might want to have a couple of chains on board and ready to go.



The Utah DOT has the authority to restrict highway travel to vehicles either running chains or at least having them in your possession. However, Utah requirements do not expressly state how many chains or on what tires they are to be installed.



Vermont has a "traffic committee" that will decide if use of chains will be required. The reg mandates that the "advance notice shall be given to the traveling public through signage and, whenever possible, through public service announcements." This language also mandates that adequate space be provided to chain up.

The regulation does not outline the required number or placement of chains.



Chains must be carried Nov. 1 through April 1. It takes five chains to comply with the requirement. However, all vehicles of more than 10,000 pounds gross vehicle weight must carry two extra chains for use in the event that road conditions require the use of more chains or in the event that chains in use are broken or otherwise made useless.

Chains or cables?

Chains must have two sides attached with cross-sections. Cables can be permitted. Plastic chains are prohibited.


On a dual axle trailer the outside tires on both axles will need to be chained in addition to one tire on either side of either trailer axle.

Route specific

On the following routes all vehicles and combinations of vehicles of more than 10,000 pounds shall carry sufficient tire chains to meet the requirements:

  • Snoqualmie Pass I-90, North Bend (MP 32) and Ellensburg (MP 101)
  • Blewett Pass Route 97, between MP 145 and
  • MP 185
  • Stevens Pass Route 2, Dryden (MP 108) to Index (MP 36)
  • White Pass Route 12, Packwood (MP 135) to Naches (MP 187)
  • Satus Pass Route 97, Columbia River (MP 00) to Toppenish (MP 59)
  • Chinook Pass Route 410, Enumclaw (MP 25) to SR-12 (MP 342)
  • Sherman Pass Route 20, Tonasket (MP 262) to Kettle Falls (MP 342)
  • Omak to Nespelem Route 155, Omak (MP 79) to Nespelem (MP 45)
  • Cle Elum to Teanaway Route 970, Cle Elum
  • (MP 0) to Teanaway (MP 10)
  • Gibbons Creek to Intersection of Cliffs Road Route 14, Gibbons Creek (MP 18) to intersection of Cliffs Rd. (MP 108)
  • Newhalem to Winthrop Route 20, Newhalem
  • (MP 120) to Winthrop (MP 192)
  • Mount Baker Highway Route 542, (MP22) to (MP 57)
  • Ellensburg to Selah I-82 from Ellensburg (MP 3) to Selah (MP 26)



When Wyoming officials enact the chain law, commercial vehicles must have chains on at least the two outside tires of one drive axle. Signs notify you when the chain law is in effect.

Not complying can cost you a minimum of $250. But, if you block the highway because you don't have chains on, expect a $750 fine. LL