with service continuation depending on late-night ridership and on corporate sponsorship. , late-night service was cut back from 2:30am to 2:00am, and extended hours were dropped from 5 of the 15 key bus routes. Late-night service was discontinued altogether in March 2016. The category of key bus routes figured into Boston mayor Marty Walsh's "Go Boston 2030" initiative, which included the goal of having "every Boston household" within a 10-minute walk from a T station or a bus stop on a key route. In addition, a new key route was proposed to connect the Longwood Medical and Academic Area with JFK/UMass station via Roxbury. In May 2022, the MBTA released a draft plan for a bus network redesign, which included potential changes to most of the key routes. A number of other routes would be upgraded to key bus route frequency, forming a high-frequency bus network complementing the rapid transit network. A revised plan was released in November 2022. Key routes criteria The MBTA's Service Delivery Policy uses five criteria when determining if a route is part of the Key Bus Routes program. High ridership demand Connectivity within the system Geographic coverage Accommodation of major new development Operation as bus rapid transit Policy standards A bus route that has been identified as a key route must adhere to two policy standards: Span of service and frequency of service, both of which mandate service levels well above a standard local route. The following tables outline these standards as compared to standard local routes. Route list There are 15 key routes within the MBTA system: 1, 15, 22, 23, 28, 32, 39, 57, 66, 71, 73, 77, 111, 116, and 117. Elected officials and members of the public have asked the MBTA for limited-stop or express service along all of these routes. 1 The 1 Harvard Square–Nubian Station, which connects Cambridge with Roxbury, was formed in September 1962 when two routes, split at Massachusetts Avenue (now Hynes Convention Center), were merged – the 76 Harvard–Massachusetts station and the 47 Massachusetts station–Dudley. In May 1987, the route was realigned from its former alignment on Washington Street southeast several blocks onto Albany Street and Melnea Cass Boulevard to serve Boston Medical Center. The route now runs mostly along Massachusetts Avenue, from Harvard, past the Massachusetts Institute of Technology, over the Charles River via the Harvard Bridge into Boston, past the Berklee College of Music