What does DOT on car tires mean?

[MacRylee]

DOT is the abbreviation for the U.S. Department of Transportation, a government agency responsible for transportation management. The presence of 'DOT' on a tire indicates that the tire meets the safety standards set by the U.S. Department of Transportation. Here is some information about DOT: 1. DOT is a U.S. government agency for transportation management, established in 1967, with nine subordinate bureaus including the U.S. Coast Guard, Federal Aviation Administration, Federal Highway Administration, Federal Railroad Administration, National Highway Traffic Safety Administration, Federal Transit Administration, Saint Lawrence Seaway Development Corporation, Maritime Administration, and the Office of the Secretary. 2. According to U.S. law, all tires sold in the U.S. market must pass DOT testing and have the DOT mark molded on the tire sidewall after obtaining certification. Tires without the DOT mark are not allowed to be imported, produced, or sold in the U.S. market.