For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
SNOW EMERGENCY ROUTES. Those streets generally traversing the entire city or a major part thereof, and are considered essential to the rapid movement of emergency vehicles and normally carry the heaviest traffic volumes.
SNOW TIRES. Any tires mounted on drive wheels of motor vehicles which are especially designed to give effective traction on snow, mud or ice-covered streets by means of extra heavy duty treads with special high-traction patterns, except that no tire so defined shall be constructed to be a SNOW TIRE if it is damaged or worn to the extent that its performance would be substantially impaired.
TIRE CHAINS. Any metal chains mounted on drive wheel tires of motor vehicles which cross the tread of each such tire laterally in at least three different places.
(1999 Code, § 24-8-1)