Ontario Highway 58 - Route Description

Route Description

The segment between Highway 406 in Thorold and Niagara Road 57 east of Thorold is a four-lane freeway. It also contains the Thorold Tunnel, one of the three tunnels under the Welland Canal. Overall, the highway is 19.5 km (12.1 mi) in length.

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 continues as Niagara Regional Road 58 to Killaly Street. 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 over the next 2 kilometres (1.2 mi), before ending at Highway 58A (Humberstone Road) at the southern edge of the built up area of Welland.

The northern section of Highway 58 begins at an intersection with the western terminus of Highway 20, approximately 3.5 kilometres (2.2 mi) east of Highway 406. South of this intersection, the road that carries Highway 58 continues as Niagara Regional Road 82, whereas west of the intersection the road that carries Highway 20, Lundy's Lane, continues as Niagara Regional Road 58 through Allanburg. Highway 58 proceeds north, at first along an established concession road, before branching to the east on its own alignment known as Davis Road. The road crosses several flooded valleys that form part of the Welland Canal. before arriving at Thorold Stone Road, at which point Highway 58 turns west and enters the Thorold Tunnel, descending beneath the canal.

At the western end of the tunnel, Highway 58 emerges as a divided highway in the Thorold – St. Catharines urban area. It interchanges with Pine Street; the eastbound on-ramp from Pine Street features a stop sign and no merging lane prior to entering the Thorold Tunnel. West of Pine Street, the route passes beneath a railway and curves slightly southwest. It interchanges with Collier Street, gradually curving to the northwest and passing beneath Richmond Street. Highway 58 ends at a complicated interchange with both St. Davids Road as well as Highway 406 on the edge of the Niagara Escarpment.

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