Highway 135 was a short route that travelled along present day Exeter Road on the south side of London.

After immediately intersecting Wonderland Road, which did not continue south at the time, it passed east through a mix of farmland and development.

[2][3] At the intersection with Sholto Drive, the route passed north of the Ministry of Municipal Affairs and Housing, as well as the City of London Exeter Road Operations Centre.

At Wellington Road, which the route turned south onto, it encountered the Crossroads Centre shopping mall as well several large hotel chains.

The lack of provincial significance and the increasing urbanisation of the route led the Ministry of Transportation to transfer jurisdiction to the City of London on October 1, 1993.