Watertown Square is the terminus of several MBTAbus and trackless trolley routes.
From the en.wikipedia.org
These buses run dual-mode, trackless trolley in the tunnel and diesel bus outside.
From the en.wikipedia.org
Bus and trackless trolley fares are $1.50 for CharlieCard holders, $2.00 for others.
From the en.wikipedia.org
I would get on the No. 10 trackless trolley line at the end of its route at Front and Poplar streets, a block from Synvar.
From the delawareonline.com
Until 1984, the Harvard Square stop was the northern terminus of the Red Line, and it still functions as a major transfer station between subway, bus, and trackless trolley.