entirety of Route 73 was converted from streetcars to trackless trolleys in 1958. Trackless trolleys ran from then until March 13, 2022. No changes to the route were proposed in the May and November 2022 network plans. 77 The 77 Arlington Heights–Harvard Station route provides service between the town of Arlington and Harvard station along Massachusetts Avenue. Until the Red Line Northwest Extension opened in the 1980s, routes 77/77A provided the bulk of transit service northwest of Harvard, with combined streetcar headways under one minute during rush hours in 1945. Route 77 was converted to diesel bus in 1955; route 77A (Harvard–North Cambridge carhouse short-turn service) was converted to trolleybus in 1958 to free up streetcars for the upcoming Highland branch conversion, and so that boarding islands on Massachusetts Avenue could be removed to benefit automobiles. Route 77A formerly provided all local service south of the carhouse, with route 77 making limited stops on that segment; however, it was largely replaced by route 77 service in stages from 1998 to 2005, and eliminated entirely in 2022. In 2017, Arlington applied for a private grant to add signal priority, queue jumps, and possibly bus lanes on their section of the route. No changes to the route were proposed in the May and November 2022 network plans. 111 The 111 Woodlawn–Haymarket Station provides a route between downtown Boston and parts of Chelsea, via the Charlestown Bridge and the Tobin Bridge. (Some trips formerly continued east as far as Revere.) When the Boston Elevated Railway bought the route in 1936, it ran as streetcars between Chelsea Square and Woodlawn. On October 10, 1936, the line was replaced by an extension of the City Square–Chelsea Square bus route. The line was extended in April 1975 to Haymarket after the closure of the Charlestown Elevated; the partial extension beyond Woodlawn was done in January 2001. Service past Woodlawn was discontinued in September 2019, while Cary Square short turns were replaced by Woodlawn trips in December 2021. The 111 is among the most frequent numbered MBTA bus routes, with service running every 5 minutes during rush hour. No changes to the route were proposed in the May and November 2022 network plans. 116/117 The 116 Wonderland Station–Maverick Station via Revere Street and 117 Wonderland station–Maverick station via Beach Street serve East Boston, and the cities of Chelsea and Revere. The 116 and 117 share most of