 The trains operate in a push-pull configuration, with the cab car typically facing Washington.Prior to being replaced by new Bombardier Multilevel II cars, MARC's ex-Metra Pullman Gallery cars were used exclusively on the Brunswick Line, which is the only MARC line with all low-level platforms (except the Frederick Branch, which has a high level platform at Monocacy station).The Brunswick Line has service only on weekdays, with 9 trains in each direction, and an additional train outbound from Union Station on Fridays.