For the purpose of this subchapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
SNOW EMERGENCY. A condition created by a combination of meteorological circumstances which produces a snowfall accumulation, which condition in the discretion of the Mayor calls for a declaration of snow emergency in order to provide for the safe and expeditious movement of traffic and the prompt and economical removal of snow from designated arteries of traffic.
SNOW STREET. A city-accepted street, roadway, avenue or boulevard including the berm or shoulder adjacent thereto upon which signs have been permanently or temporarily affixed designating such arteries of traffic as a snow emergency street.
(`94 Code, § 72.30)