If you ride the Haverhill Line (or the Orange Line) between Wellington and Malden Center the tracks run through a short tunnel. The Medford Branch stays on the surface, crosses over the tunnel and runs in a westerly direction. It originally ran close to Medford Sq. but has been cut back east of I-93. It crosses Middlesex Av. at grade and passes under the Fellsway, ending just west of there. Google Map Fellsway, Medford, Massachusetts and switch to the satellite view to see where it is. Its very clear!
Gerry. STM/BSRA
The next stop is Washington. Change for Forest Hills Trains on the Winter St. Platform, and Everett Trains on the Summer St. Platform. This is an Ashmont train, change for Braintree at Columbia.