https://leg.colorado.gov/sites/default/files/documents/2019A/bills/fn/2019a_hb1207_r1.pdf
Summary of Legislation The bill requires motor vehicles driving on I-70 between milepost 133 (Dotsero) and milepost 259 (Morrison), from September 1 to May 31 of each year, to be equipped with:
• tire chains or an alternative traction control device (i.e. cable chains);
• four-wheel drive or all-wheel drive with tires that have a tread depth of three-sixteenths of an inch and that are adequate for the conditions; or
• tires with any form of the mountain-snowflake symbol (i.e. M&S, M+S, or M/S)imprinted by the manufacturer and a tread depth of at least three-sixteenths of an inch.
Under the bill, "equipped" means that a motor vehicle uses or carries the appropriate traction equipment for icy or snow-packed conditions.
A noncommerical violator of these requirements commits an existing class B traffic infraction and is subject to a $100 fine and a $32 surcharge. If a violation results in the closure of at least one lane of traffic, the violator is subject to a penalty of $500 and a $156 surcharge.
Theoretically a person driving summer tires that have sufficient depth and M+S on the sidewall, can get into a crash and fight the traction charges.
But hey, maybe the legislature thought M+S means Mountain-Snowflake... it has the right letters for the acronym
Summary of Legislation The bill requires motor vehicles driving on I-70 between milepost 133 (Dotsero) and milepost 259 (Morrison), from September 1 to May 31 of each year, to be equipped with:
• tire chains or an alternative traction control device (i.e. cable chains);
• four-wheel drive or all-wheel drive with tires that have a tread depth of three-sixteenths of an inch and that are adequate for the conditions; or
• tires with any form of the mountain-snowflake symbol (i.e. M&S, M+S, or M/S)imprinted by the manufacturer and a tread depth of at least three-sixteenths of an inch.
Under the bill, "equipped" means that a motor vehicle uses or carries the appropriate traction equipment for icy or snow-packed conditions.
A noncommerical violator of these requirements commits an existing class B traffic infraction and is subject to a $100 fine and a $32 surcharge. If a violation results in the closure of at least one lane of traffic, the violator is subject to a penalty of $500 and a $156 surcharge.
Theoretically a person driving summer tires that have sufficient depth and M+S on the sidewall, can get into a crash and fight the traction charges.
But hey, maybe the legislature thought M+S means Mountain-Snowflake... it has the right letters for the acronym