Maryland Code, Transportation § 21-207

(a) Notwithstanding any other provision of this title, a funeral procession facing a red signal may continue through or make a turn at an intersection if the first vehicle in the procession already entered the intersection before the signal changed from green to red.

(b) While a funeral procession is proceeding through a red signal as permitted by this section, a vehicle that is not in the procession may not enter the intersection, even if it is facing a green signal, unless it can do so without crossing the path of the procession. When the red signal changes to green while the funeral procession is still within the intersection, a vehicle facing a green signal may proceed, but the funeral procession has the right-of-way.

(c) The driver of a vehicle in a funeral procession does not have any privilege granted in this section unless: