As used in this article, certain terms are defined as follows:
Full chains, strap chains or other type of chains mounted on both rear wheels on a motorized vehicle.
Tires having treads designed for use in snow, which tires shall be in such condition as to serve the purpose for which they are designed. A "mud and snow passenger tire" means a tire which, when compared with a conventional rib type, is designed primarily to provide additional starting, stopping and driving traction in mud and snow. The tread has ribs, lugs, blocks or buttons, is generally discontinuous and has the following marking and characteristics when inflated:
A substantial portion of the lug, block or rib edges in the tread design are at an angle greater than 30° to the time circumferential center line.
On at least one side of the tread design, the shoulder lugs protrude at least 1/2 inch in a direction generally perpendicular to the direction traveled.
Tires manufactured after January 1, 1976, shall be permanently labeled on one sidewall with the words "Mud/Snow" or any contraction using the letters "M" and "S", such as MUS, M/S, M&S, etc.
Any precipitation depositing any accumulation on the streets, including snow, sleet, hail, ice and freezing rain.
A state of highway condition that is hazardous and dangerous to vehicular and pedestrian traffic and is so declared by the Mayor.
Streets in the City so designated and marked.
All self-propelled motorized vehicles using City streets and highways, excluding public transportation conveyances.