MTA buses: Lines 2, 5, 7, 13, 23, 77, M1, M2 and M3 on main roads. More may be added.
MTA light rail: Running from Hunt Valley to North Avenue. Further service unclear.
Metro subway: Not determined by last night.
MARC trains: Penn Line on holiday "S" schedule. Camden Line running trains 845, 849, 848 and 852. No Frederick service.
Commuter buses: Nos. 120, 150, 160, 210, 310, 311, 731 canceled. All others on regular schedule.
MTA mobility service: Dialysis patients only
BWI Airport: Open with limited service. Call your airline or check www.bwiairport.com.
Amtrak: Normal schedule in Northeast Corridor. No trains will run south of Washington. For updates, check www.mtamaryland.com.