One-way roadways and rotary traffic islands.

(a) Upon a roadway where traffic-control devices establish one-way traffic, a vehicle shall be driven only in the direction designated. Such designation may be at all times or at such times as shall be indicated by traffic-control devices. (b) A vehicle passing around a rotary traffic island shall be driven only to the right of such island. (c) A driver about to enter a rotary traffic island shall yield the right-of-way to any vehicles passing around it.