Maryland HOV lane rules require at least two people in the vehicle to use the high-occupancy lanes on I-270 in Montgomery County and US-50 in Prince George’s County during restricted hours, and driving solo when restrictions apply carries a $90 fine.1Maryland Department of Transportation State Highway Administration. High Occupancy Vehicle (HOV) Lanes – MDOT SHA2Maryland Courts. Traffic Fine Schedule The two corridors run on very different schedules, and the exemptions have narrowed recently, so the details matter.
When the Restrictions Apply
The I-270 HOV lane runs between I-370 and the Capital Beltway (I-495) and is restricted only during weekday rush hours. Southbound it operates from 6:00 a.m. to 9:00 a.m., and northbound from 3:30 p.m. to 6:30 p.m. Any vehicle can use the lane outside those windows.1Maryland Department of Transportation State Highway Administration. High Occupancy Vehicle (HOV) Lanes – MDOT SHA
The US-50 HOV lanes work on a completely different clock. They are restricted 24 hours a day, seven days a week.1Maryland Department of Transportation State Highway Administration. High Occupancy Vehicle (HOV) Lanes – MDOT SHA Drivers who assume US-50 follows the I-270 rush-hour pattern get caught by this on weekends and late nights. Both corridors are marked with white diamond symbols on the pavement and on posted signs.
Who Counts as a Passenger
Both facilities are HOV 2+, meaning two people minimum.1Maryland Department of Transportation State Highway Administration. High Occupancy Vehicle (HOV) Lanes – MDOT SHA Children and infants count. A parent driving with a baby in a car seat meets the requirement, because every state with HOV lanes counts children and infants as passengers.3Federal Highway Administration. Frequently Asked HOV Questions
Pregnancy does not. The FHWA counts a pregnant driver as a single occupant for HOV purposes.3Federal Highway Administration. Frequently Asked HOV Questions
Vehicles Allowed With a Single Occupant
A few vehicles can use Maryland’s HOV lanes regardless of occupancy:
- Motorcycles. Federal law requires states to allow motorcycles in HOV lanes unless the state certifies a specific safety hazard and the U.S. Secretary of Transportation accepts that certification. Maryland has not, so motorcycles ride in HOV lanes freely.4Office of the Law Revision Counsel. 23 USC 166 – HOV Facilities1Maryland Department of Transportation State Highway Administration. High Occupancy Vehicle (HOV) Lanes – MDOT SHA
- Emergency vehicles responding to emergencies, including ambulances, fire trucks, and police.1Maryland Department of Transportation State Highway Administration. High Occupancy Vehicle (HOV) Lanes – MDOT SHA
The Electric Vehicle Permit Is Gone
Maryland used to let plug-in electric vehicles and plug-in hybrids use the HOV lanes with a single occupant if the driver got a permit from the Motor Vehicle Administration. That program ended on September 30, 2025. The MVA is no longer accepting applications, and permits issued before the program ended are no longer valid.5Maryland Motor Vehicle Administration. High Occupancy Vehicle (HOV) Permit Issuance for Plug-in Electric Vehicles EV and hybrid drivers now need a passenger like everyone else.
Maryland’s HOV lanes are also not HOT (high-occupancy toll) lanes. There is no option to pay a toll to drive solo in either corridor.
The Fine and What Else It Can Cost You
Driving alone in a Maryland HOV lane during restricted hours violates Maryland Transportation Code 21-314(b) and carries a preset fine of $90. That figure includes a $7.50 Special Funds surcharge built into all preset traffic fines in the state.2Maryland Courts. Traffic Fine Schedule
The fine is not the whole picture. An HOV violation is a moving violation, so a conviction can add points to your driving record through the MVA. Five to seven points triggers a mandatory Driver Improvement Program. Eight or more can lead to license suspension. Even a small number of points often pushes auto insurance premiums up at renewal.
How Officers Catch Violators
Maryland State Police and local law enforcement handle HOV enforcement by eye. Officers watch traffic during patrols and pull over drivers who appear to be alone in the vehicle during restricted hours.1Maryland Department of Transportation State Highway Administration. High Occupancy Vehicle (HOV) Lanes – MDOT SHA
Maryland uses automated cameras for speed and red-light violations, but no automated system counts passengers on the HOV corridors. Enforcement intensity tracks police presence, which tends to be heavier during the peak windows when the I-270 restrictions are active.
Out-of-State Drivers
An HOV ticket in Maryland can follow you home. Most states participate in the Driver License Compact, which operates on the principle of “One Driver, One License, One Record.” Under the compact, your home state treats the Maryland violation as if it happened there and may assess points under its own schedule.6The Council of State Governments. Driver License Compact How your home state handles the offense depends on its own rules, but ignoring the ticket because you live elsewhere is a mistake.
When Missing or Unclear Signs Matter
The statute you’d be cited under, 21-314(b), targets driving in an HOV lane “when not authorized by traffic control device.” If the signs marking the restriction are missing, damaged, or unclear where you were stopped, that language can support a defense. Along Maryland’s corridors, the regulatory signs follow national standards under the Manual on Uniform Traffic Control Devices and come in three forms: an occupancy definition sign stating “2 OR MORE PERSONS PER VEHICLE,” an operation sign showing the restricted days and hours, and an advance sign warning that an HOV restriction begins ahead.7Federal Highway Administration. Manual on Uniform Traffic Control Devices – Chapter 2G Preferential and Managed Lane Signs If you plan to contest a ticket on that basis, note the location and take photos of the signage (or the lack of it) as soon as you can.