Unless otherwise provided by this section, the operator of a vehicle traveling on the street and at the place of intersection and in the direction set forth herein shall observe the following regulations concerning turns. Signs shall be conspicuously posted at or near the place of intersection where turns are regulated:
Street
Place
Direction of Travel
Regulation
Effective
Main
Bank of LeRoy, drive-in, 14-16 Main,
East
No left turn
At all times
U-turns at all intersections and at all other places regulated by signs shall be prohibited.