The expressway connects to Highway 401. Highbury Avenue continues south as a two-lane road to St. Thomas. At varying times, the portion of Highbury between Hamilton and Fanshawe Park Roads was rebuilt from a 2-lane road to a 4-lane road. Horton Street is a main thoroughfare in the core area of London, the most direct and widest artery south of the CNR railway tracks, between Hamilton Road and Springbank Drive. Horton Street was originally part of the grid of streets south of the CNR tracks, with its west end at Thames Street and most traffic turning a block east at Ridout to enter or exit Horton. The east end was mainly residential, with traffic flowing onto and off of Hamilton just east of Maitland Street where Horton meets Hamilton. After years of controversy, in 1985, Horton was extended west across the Thames River, between the CNR tracks and Beaconsfield Avenue to Wharncliffe Road, then assumed the Beaconsfield right-of-way from there to end at Springbank Drive. Huron Street is a main thoroughfare in the eastern part of London, traversing the north edge of the city's older grid-network neighbourhoods, from the Thames River at Gibbons Park to the London International Airport. It is interrupted for by a ravine between William and Maitland Streets. A 1971 official plan envisioned construction of the missing link, but is not now expected, the road to the west being of minor significance, and amid environmental considerations through the ravine. Most of the route is two-lane road. Historically, Huron Street extended east to Crumlin Sideroad at the east edge of London Township (closed to traffic upon development of military operational areas at the airport, but partly reopened in the 1990s), and there have been plans to extend it west across the Thames River to Western Road, connecting with an orphan segment between the river and Western Road which has now been renamed as part of the roadways at Western University. There is no current information on the routing of Huron in the vicinity of William and Maitland prior to the development of the area as part of London. Hyde Park Road is an north–south arterial road in London, Ontario, Canada. It extends from the Thames River in the Oakridge area northward through the village and road namesake of Hyde Park and north of the city to Highway 7. Hyde Park Sideroad originally ran northward on a fairly straight alignment through the lowlands east of the Byron Bog.