The Green Line’s E branch is closed. Here’s why, and how to get around it. The C branch previously closed for 12 days, while the entire Orange Line will shut down for 30 days later this month.

Wickedpedia Why doesn’t the Green Line have an ‘A’ branch? A shortage of electric trolley cars in the 1960s is largely to blame. A postwar all-electric streetcar destined for Watertown in 1946.