 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 . 
