Maryland Bans Lane Splitting, Allows Two Riders Abreast

Section 21-1303 sits in the subtitle on driving on roadways laned for traffic, and subsection (a)(1) sets the field of play: the rules apply on any roadway divided into two or more clearly marked lanes for vehicular traffic. Four short prohibitions follow, and together they close every version of splitting.

Subsection (d) is the direct ban: a person may not operate a motorcycle between lanes of traffic or between adjacent lines or rows of vehicles. The second half of that sentence is what makes Maryland's rule broader than a simple lane-line prohibition. "Adjacent lines or rows of vehicles" reaches traffic that has stopped and bunched at a red light or in a jam, where there may be no marked lane line to ride at all. Filtering to the front of a queue on Route 50 or the Baltimore Beltway is therefore prohibited in the same words as splitting at speed.

Subsection (c) closes the remaining route. It provides that the operator of a motorcycle may not overtake and pass in the same lane occupied by the vehicle being overtaken. So even without leaving the lane line, a rider may not slip up the inside of a car sharing the lane. To pass lawfully in Maryland a motorcyclist has to change lanes and use the full width of the new lane in the ordinary way.

The one exemption is narrow and is not for riders. Subsection (a)(2) disapplies subsections (c) and (d) to police officers in the performance of their official duties. That covers a Maryland State Police or municipal motor unit working traffic; it does not extend to other emergency responders, to escort riders, or to a civilian following a police motorcycle through congestion.

Maryland does grant motorcyclists a lane right that many drivers do not realise exists. Subsection (b)(2) states that every motorcycle is entitled to the full use of a lane, and that a motor vehicle may not be driven in any manner that deprives a motorcycle of the full use of a lane. That is a duty on the car, not on the bike, and it is the provision a rider crowded toward the shoulder should be pointing at.

That entitlement is deliberately switched off for group riding. Subsection (b)(1) says the full-lane subsection does not apply to motorcycles operated two abreast in a single lane, and subsection (e) caps the practice: motorcycles may not be operated more than two abreast in a single lane. Read together, two riders may share one lane side by side by choice, and in doing so they give up the claim to the full lane each would otherwise have. A third rider pulling alongside makes the formation unlawful, so a group has to run in staggered pairs rather than three across.

Nothing elsewhere in the Maryland Vehicle Law authorises filtering, and the structure of § 21-1303 shows the omission is deliberate rather than accidental. The section is where the General Assembly wrote every motorcycle lane rule it wanted, it contains an express exemption clause in (a)(2), and that clause names only police officers. There is no speed threshold below which splitting becomes lawful, no congestion trigger, and no local option: § 25-102 lets local authorities regulate parking, speed limits, truck routes, bicycles, snowmobiles, golf carts and low speed vehicles on their own highways, but gives no county or municipality power to permit motorcycle filtering.

A violation of § 21-1303 carries no penalty of its own, so Transportation Article § 27-101(a) makes it a misdemeanour and § 27-101(b) caps the fine at $500. It is charged by citation at the roadside rather than by camera. On the licence side, splitting is a moving violation that § 16-402(a) does not list among the named two, three and five point offences, so it falls into the catch-all at § 16-402(a)(1), which assesses 1 point for any moving violation not listed and not contributing to an accident.

If the manoeuvre contributes to a collision, § 16-402(a)(14) raises it to 3 points. Points are assessed by the Motor Vehicle Administration as of the date of the violation once a conviction is recorded, and a driver who splits while riding on a revoked licence can also have the reinstatement date extended under § 16-402(c)(1). A rider crowded out of a lane by a car has the mirror-image claim under § 21-1303(b)(2), which is enforced against the driver of the motor vehicle.