a concurrency with the Provincial Highway (later Highway2) between Lambeth and downtown London. Until the summer of 1925, Ontario highways were named rather than numbered. When route numbering was introduced, the route between St. Thomas and Elginfield became Provincial Highway4. 1927 saw several new sections of road assumed that would become portion of Highway4. On September14, the route was extended to Highway 8 at Clinton. Further north, a new highway was created on June22, 1927, between Highway 9 at Walkerton and Highway 6 at Durham. This latter section was designated as Highway4A. On March12, 1930, Highway4 was extended to Durham, fully absorbing the route of Highway4A in the process. Two months later, on May11, it was extended south to Bedford Street (now Edith Cavell Boulevard) in Port Stanley. On April11, 1934, the highway was extended east to the intersection of Highway 10 in Flesherton. Highway4 reached its maximum length of when it was extended from Flesherton to Highway 24 in Singhampton in the mid-1970s. Downloads As part of a series of budget cuts initiated by premier Mike Harris under his Common Sense Revolution platform in 1995, numerous highways deemed to no longer be of significance to the provincial network were decommissioned and responsibility for the routes transferred to a lower level of government, a process referred to as downloading. Portions of Highway4 were transferred to the counties of Elgin, Huron, Bruce and Grey on January1, 1998. The former portion of Highway 4 south of St. Thomas is now signed as Elgin County Road 4. The former northern portion is broken into several different roads: Huron County Road 4 from Clinton to near Wingham Bruce County Road 4 (London Road) from near Wingham to Riversdale A former concurrency with Highway9 between Riversdale and Walkerton Grey County Road 4 from Walkerton to Simcoe County Road 124 just south of Singhampton In 2017, the City of London announced that Highway 4 through London would be re-signed and re-routed via Richmond Street, Sunningdale Road, and Wonderland Road, resulting in a short concurrency with Highway 401 between the Colonel Talbot Road and Wonderland Road interchanges. Major intersections References 004 Roads in London, Ontario Transport in St. Thomas, Ontario