Section 21-314 - Use of High Occupancy Vehicle (HOV) lanes(a) In this section, "HOV lane" means a high occupancy vehicle lane, the use of which is restricted by a traffic control device during specified times to vehicles carrying at least a specified number of occupants.(b) Except as provided in subsection (c) of this section, a person may not drive a vehicle in an HOV lane unless authorized by a traffic control device.(c) The following vehicles may be driven in an HOV lane at all times regardless of the number of passengers in or on the vehicle: (3) A plug-in electric drive vehicle displaying a valid permit issued under § 25-108 of this article; and(4) A tow truck that is properly registered in accordance with § 13-920 of this article and is using any visual signal that meets the requirements of § 22-218 of this article while responding to a call for service if an appropriate law enforcement agency has authorized the tow truck operator to use HOV lanes.Amended by 2017 Md. Laws, Ch. 748,Sec. 1, eff. 10/1/2017.Amended by 2016 Md. Laws, Ch. 734,Sec. 1, eff. 10/1/2016.Added by 2014 Md. Laws, Ch. 6,Sec. 1, eff. 10/1/2014.