Maryland Code, Transportation § 24-105

(1) Any vehicle carrying wooden prefabricated roof trusses in an inverted position, if the trusses do not extend more than 10 feet beyond the rear of the bed or body of the vehicle;

(2) A combination of vehicles carrying an indivisible load if the load is not over 70 feet long, and the load is being transported during daylight hours;

(3) Any vehicle carrying:

(4) Any combination of vehicles carrying:

(1) Except as provided in items (2) and (3) of this subsection, may not extend more than 3 feet beyond the foremost part of the vehicle;

(2) May extend more than 3 feet beyond the foremost part of a vehicle equipped with front-end loading attachments and containers used in collecting garbage, rubbish, refuse, or recyclable materials when the vehicle is actively engaged in collecting garbage, rubbish, refuse, or recyclable materials; and

(3) May not extend more than 4 feet beyond the foremost part of a stinger-steered automobile transporter.

(c)(1) Except as provided in paragraph (2) of this subsection, and subject to the maximum length limits of § 24-104.1 of this subtitle, the load on any vehicle operated alone or the load on the rear vehicle of a combination of vehicles, including a stinger-steered automobile transporter, may not extend more than 6 feet beyond the rear of the bed or body of the vehicle.