(a) (1) The State Highway Administration may designate any highway or any separate roadway under its jurisdiction for one-way traffic and shall place appropriate signs giving notice of the designation.
(2) On a roadway designated and signposted for one-way traffic, a vehicle may be driven only in the direction designated.
(b) A vehicle passing around a rotary traffic island may be driven only to the right of the island.
Structure Maryland Statutes
Title 21 - Vehicle Laws -- Rules of the Road
Subtitle 3 - Driving on Right Side of Roadway; Overtaking and Passing; Use of Roadway
Section 21-301 - Driving on Right Side of Roadway; Exceptions
Section 21-302 - Passing Vehicles Going in Opposite Directions
Section 21-303 - General Rules Governing Overtaking and Passing Vehicles
Section 21-304 - When Passing on Right Is Permitted
Section 21-305 - Limitations on Overtaking or Driving to Left
Section 21-307 - No-Passing Zones
Section 21-308 - One-Way Highways and Roadways; Rotary Traffic Islands
Section 21-309 - Driving on Laned Roadways
Section 21-310 - Following Too Closely
Section 21-311 - Driving on Divided Highways
Section 21-312 - Entering or Leaving Controlled Access Highways
Section 21-313 - Restrictions on Use of Controlled Access Highways