Section 4121 - 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.21 Del. C. 1953, § 4121; 54 Del. Laws, c. 160, § 1; 57 Del. Laws, c. 670, § 13A; 60 Del. Laws, c. 701, § 21.;