MARC anticipates afternoon delays

As with VRE, Maryland's afternoon train service could be affected by the CSX freight train derailment south of Washington on Tuesday.

The Maryland Transit Administration says trains are starting to get through the CSX derailment. As a result, there may be some delay to MARC trains on the Camden and Brunswick lines this afternoon as the freight congestion clears.

Here's a link to the MARC Tracker, which shows the location of commuter trains.