Making right or left turn

39:4-115. The driver of a vehicle or the motorman of a streetcar: a. intending to turn to the right or left at an intersection where traffic is controlled by traffic control signals or by a traffic or police officer, shall proceed to make either turn with proper care to avoid accidents and, except as provided in b. below, only upon the "go" signal unless otherwise directed by a traffic or police officer, an official sign or special signal; or b. intending to turn right at an intersection where traffic is controlled by a traffic control signal shall, unless an official sign of the State, municipality, or county authority having jurisdiction over the intersection prohibits the same, proceed to make the turn upon a "stop" or "caution" signal with proper care to avoid accidents after coming to a full stop, observing traffic in all directions, yielding to other vehicular traffic traveling in a direction in which the turn will be made, and stopping and remaining stopped for pedestrians crossing the roadway within a marked crosswalk, or at an unmarked crosswalk, into which the driver is turning. Both the approach for and the turn shall be made as close as practicable to the right-hand curb or edge of the roadway, unless such intersection is otherwise posted.