A. 
On those days when conditions are suitable for coasting, vehicular traffic is hereby prohibited from using the following streets or parts of streets during such time as official signs are erected indicating that such streets or parts of streets are reserved for coasting:
(Reserved)
B. 
The foregoing provision shall not apply to drivers of vehicles having business within such reserved areas or to drivers of vehicles whose residences are within such reserved areas.
The Chief of Police may temporarily establish a zone of quiet upon any street where a person is seriously ill. Said temporary zone of quiet shall embrace all territory within a radius of 200 feet of the building occupied by the sick person. Said temporary zones of quiet shall be designated by the Chief of Police by placing at a conspicuous place in the street a sign bearing the words "Zone of Quiet."