https://law.justia.com/codes/maryland/2010/transportation/title-22/subtitle-2/22-218-2/ Yes they are allowed in MD. I tow in Northern VA and in VA the law is if you are towing a vehicle with wheels on the ground you must use your beacon. In VA the law specifically states flatbeds don't need to use beacons while in motion. The problem we have is it is poorly worded. C. Vehicles equipped with warning lights authorized in §§ 46.2-1020 through 46.2-1027shall display lighted warning lights as authorized in such sections at all times when responding to emergency calls, towing disabled vehicles, or constructing, repairing, and maintaining public highways or utilities on or along public highways, except that amber lights on vehicles designed with a ramp on wheels and a hydraulic lift with a capacity to haul or tow another vehicle, commonly referred to as "rollbacks," need not be lit while the vehicle is in motion unless it is actually towing a vehicle https://law.lis.virginia.gov/vacode/title46.2/chapter10/section46.2-1030/ So I've had some people tell me they think it means flatbeds have to use the beacon when towing a car on the deck but to me it is saying you should use them when towing a car on the stinger. Sent from my Moto E (4) using Tapatalk