Ontario Highway 503
Highway 503 was a provincial secondary highway in Ontario, Canada, that existed between 1956 and 1998. Between 1956 and 1963, the highway stretched from Kirkfield to Sebright, and then along the Monck Road from Sebright to Kinmount, entirely within Victoria County. In 1964, the route was extended to Highway 121 in Tory Hill along the route of Highway 500, which was removed from the network. Its total distance of was downloaded to the various counties in which it resided. Today the road exists as:
Kawartha Lakes Road 45 is a municipally-maintained class-3 roadway
located in the city of Kawartha Lakes, in the Canadian province of Ontario. The road crosses the entire city from west to east, passing through several unincorporated villages along the way, Sebright, Uphill, Norland, Dongola and Kinmount. The road runs in a predominantly east-west direction and covers a distance of, primarily rural geography. Its western terminus is Kirkfield Road, and its eastern terminus is the Bobcaygeon Road.
Prior to 1 January 1998, the Kawartha Lakes Road 45 in its entirety was designated as Secondary Highway 503. Highway 503 was commissioned in 1956, loosely following the Monck Road colonization road.Major intersections