On September 5, 2021, service to Union station resumed. Route 510 streetcars operate entirely within dedicated streetcar rights-of-way, along Spadina Avenue, Queens Quay Boulevard and in a tunnel under Bay Street. Most stops along the routes are surface stops, with islands separating the regular traffic from the streetcar tracks, and have streetcar traffic signals, partial shelters, and railings to protect patrons from the traffic. Streetcars serve Union and Spadina subway stations from underground streetcar stations, and an additional underground streetcar station exists at Queens Quay on the approach to Union station. As of November 21, 2021, the 510 Spadina route operates as three branches: 510A Spadina: Spadina station to Union station 510B Spadina: Spadina station to Queens Quay and Spadina Loop 510C Spadina: Spadina station to Spadina Ave and King St. Route 310 Spadina runs overnight between Spadina and Union stations, replacing the 510 Spadina service. It is part of the TTC's Blue Night Network, operating from approximately 1am to 5am. Stop list References External links TTC route page for 510 Spadina TTC route page for 310 Spadina Route 510 - Spadina Streetcar (Transit Toronto) Streetcar routes in Toronto 4 ft 10⅞ in gauge railways