Md. TRANSPORTATION Code Ann. § 21-305

§ 21-305. Limitations on overtaking or driving to left

(a)  Clear visibility required; return to authorized lane. —

(1)  The driver of a vehicle may not drive to the left of the center of the roadway in overtaking and passing another vehicle going in the same direction unless:

(i)  Authorized by this subtitle; and

(ii)  The left side of the roadway is clearly visible and is free of approaching traffic for a sufficient distance ahead to permit the overtaking and passing to be completed without interfering with the operation of any other vehicle approaching from the opposite direction or any other vehicle overtaken.

(2)  The overtaking vehicle shall return to an authorized lane of travel as soon as practicable and, if the passing movement uses a lane authorized for vehicles approaching from the opposite direction, before coming within 200 feet of any approaching vehicle.

(b)  Grades, curves, intersections, crossings, bridges, etc. —

(1)  This subsection does not apply on a one-way roadway.

(2)  The driver of a vehicle may not drive on the left side of any roadway if:

(i)  The vehicle is approaching the crest of a grade or is on a curve in the highway where the driver’s view is obstructed for such a distance as to be dangerous should another vehicle approach from the opposite direction

(ii)  The vehicle is crossing or approaching within 100 feet of any intersection or railroad grade crossing; or

(iii)  The driver’s view is obstructed while approaching within 100 feet of any bridge, viaduct, or tunnel.