King's Highway 4, also known as Highway 4, is a provincially maintained highway in the Canadian province of Ontario. Originally much longer than its present length, more than half of Highway 4 was transferred to the responsibility of local governments in 1998. It travels between Highway 3 in Talbotville Royal, north-west of St. Thomas, and Highway 8 in Clinton, passing through the city of London inbetween. Highway 4 was first designated in 1920, when a route between Talbotville Royal and Elginfield was assumed by the Department of Highways. It was extended in the early 1930s both south to Port Stanley as well as north to Flesherton. Route description Highway4 starts at an intersection with Highway3 in Talbotville Royal and continues north as a two-lane undivided highway. For most of its length, the highway bisects agricultural land. It travels along a short concurrency with Highway 401 from the community of Tempo to Wonderland Road. It encounters an interchange with Highway 402 before entering London city limits. As Highway4 enters London, it becomes a Connecting Link, known locally as Wonderland Road. Wonderland Road is a 4-lane arterial thoroughfare serving western London, with several big-box stores, a mall, and residential areas. The route turns east onto Sunningdale Road West, which it for a short distance before turning north along Richmond Street. Highway4 continues north, passing through Arva, when the surrounding terrain returns to farmland. Highway4 passes through Birr before intersecting with the western terminus of Highway 7 at Elginfield, which is also 1 km east of the Highway 23 junction with Highway7. The highway then curves slightly west, passing through Lucan before continuing north at Clandeboye. From here to its terminus in Clinton, Highway4 is essentially straight for . Continuing to be flanked by farmland, it then passes through the communities of Huron Park and Exeter. At Exeter, it crosses the former route of Highway 83. From there, it continues north, passing through the communities of Hensall, Ontario and Vanastra, Ontario before terminating at Highway8 in the community of Clinton. History Highway4 was originally designated in 1920 when the provincial government assumed the road running from Talbotville Royal (St. Thomas) to the Northern Highway (later Highway7) at Elginfield, via London. The portions within Elgin County were assumed on August4, while the portions south of London were assumed on June24. The portions north of and through London were assumed on August6. The route featured