For the purpose of this Article V of Chapter 430, the following special definitions, in addition to those referred to in § 430-1 of this Chapter 430 shall apply:
Any object visible for 100 feet in clear weather that is used to block off any area of a street or highway.
Any day other than a Sunday, Christmas Day, Thanksgiving Day or New Year's Day; all other holidays shall be considered business days.
The hours between 7:00 a.m. and 9:00 p.m. on any business day.
The portion of Penn Avenue bounded by Fourth Avenue and Seventh Avenue.
Any abrasive material to be put on hard snow or ice areas, including but not limited to, cinder, sand, fine gravel, sawdust, salt or fine crushed stone.
Those streets or roadways that are not snow emergency routes, as defined in this section, and which are less than 30 feet wide between curblines.
The Mayor, or in his absence, the Chief of Police.
Any person, partnership, co-partner, corporation, joint stock company, syndicate, tenant, property owner (real and personal), occupant, lessor or agent in control of a building.
The average of three or more readings in any area established by the Director.
Any tires mounted on drive wheels of motor vehicles which are specifically designed by the manufacturers to give effective traction on snow, mud or ice-covered streets by means of extra-duty treads with special high-traction patterns, except that no tire so defined shall be construed to be a snow tire if it is worn to less than 3/16 inches tread depth or is damaged or worn to the extent that its performance would be substantially impaired.
Any hard metal chains mounted on drive wheels of motor vehicles which cross the tread of each tire laterally in at least eight different places.