 The southern section of Highway 58 begins at a junction with the former Highway 3 in the city of Port Colborne , several kilometres north of Lake Erie . South of this intersection , the road once continued as Niagara Regional Road 64 to Killaly Street ; such has since been downloaded to the city of Port Colborne . Proceeding north , the highway , known locally as West Side Road , passes through the suburbs of Port Colborne , north of which it skirts the eastern edge of the Wainfleet Bog , one of the few remaining habitats of the Massasauga Rattlesnake . West of Dain City , Highway 58 crosses the Port Colborne – Welland boundary at Forks Road , a grade @-@ separated intersection . The route crosses several rail lines on a bridge south of its terminus at Highway 58A ( Humberstone Road ) at the southern edge of the built up area of Welland . North of there , it continues as Niagara Regional Road 54 ( Prince Charles Drive ) 
