serves as an alternative if the highway is closed or congested. Sheppard Avenue West West of Yonge Street, Sheppard travels west across the Sheppard Avenue Bridge over the Don and past Bathurst Street and Wilson Heights Boulevard. Further west, the road allowance became blocked in 1939 by the appropriation of land for a De Havilland aircraft plant and, after World War II, Canadian Forces Base Downsview. A crescent-shaped section of road was finally constructed along the northern edge of the now former base in the 1970s, connecting Sheppard at Wilson Heights to Keele Street. Today, Sheppard also intersects Allen Road on this section, but the intersecting portion of Allen Road was not constructed until 1982. Sheppard Avenue continues still further west to Weston Road and ends there due to the wide valley at the confluence of the two branches of the Humber River, preventing it from continuing further west. Public transportation The Line 4 Sheppard subway runs under Sheppard Avenue East from Yonge Street to Don Mills Road, with proposals to continue the line farther eastwards to the Scarborough Town Centre and westwards to Sheppard West station at Allen Road. There are five stations on the line providing access to Sheppard Avenue, including , , and , as well as the (at the junction with the Yonge section of Line 1 Yonge–University) and termini. Sheppard West station is located at the corner of Sheppard and Allen Road, and Downsview Park station is located between Keele Street and Allen Road. The extension of the Line 2 Bloor-Danforth subway will have the line terminate at Sheppard Avenue, where a future extension of Line 4 could meet with it in the future. Five bus routes run along Sheppard Avenue in Toronto from Sheppard–Yonge station: 84 Sheppard West (1963–present) 85 Sheppard East (1963–present) 98 Willowdale-Senlac (1974–present) 384 Sheppard West (Blue Night; 2015–present) 385 Sheppard East (Blue Night; 2005–present) Two express routes runs along Sheppard Avenue: 984 Sheppard West Express (1999–present) 985 Sheppard East Express (1980–present) Historical routes since 1990: 10 Van Horne (1980–2002) 26 Bayview North (1974–1991) 139 Huntingwood (1973–2002) GO Transit has stations at Agincourt on the Stouffville line, on Sheppard between Kennedy Road and Midland Avenue, Oriole on the Richmond Hill line, southwest of the intersection of Leslie Street and Sheppard, and at Downsview Park on the Barrie line, on Sheppard between Keele Street and Allen Road. Communities Emery Dublin Heights Elia