 During the late 1970s, plans arose to create a new highway link on the south side of Lake Simcoe to connect Highway 400 and Highway 12. The route for this extension was announced on June 30, 1978. It was to follow 11th Line from Highway 400 east to the Holland Marsh, where it would cross towards the northeast onto the alignment of Ravenshoe Road (York Road 32). The extension would traverse the length of Ravenshoe Road to Lakeridge Road (Durham Road 23), where it would zig-zag onto Concession Road 7 to end immediately north of Sunderland. However, heavy environmental protests ensued over the chosen route through the marsh. Consequently, then Transportation Minister Ed Fulton officially cancelled the extension on April 21, 1986. The proposal has since been reborn as the Bradford Bypass.
