The Maryland Commuter train (MARC) is expected to begin weekend service Saturday.
This weekend's services will offer nine round trips between Penn Station and Union Station on Saturday and another six on Sunday.
Stations serviced include:
Penn Station trains will depart from 7:35 a.m.- 9:15p.m.; Union Station: 9:02 a.m.- 10:35p.m.
Fare is $7 each way between Baltimore and Washington.
For more information, including detailed arrival and departure times for trains, click here.