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King's Highway 58, commonly referred to as Highway 58, is a provincially maintained highway in the Canadian province of Ontario. The route is divided into two segments with a combined length of . The southern segment travels from Niagara Regional Road 3, formerly Highway 3, in Port Colborne, to the Highway 58A junction in the southern end of Welland, a distance of ; the northern segment begins at Highway 20 near Allanburg and travels north and west to a large junction with Highway 406 at the St. Catharines – Thorold boundary, a distance of . An gap separates the two segments within Welland and Pelham. The entire route is located within the Regional Municipality of Niagara. The history of Highway 58 is tumultuous due to various relocation projects resulting from the construction of the fourth Welland Canal and Highway 406. Prior to 1997, Highway 58 was continuous and travelled through the west side of Welland, maintained under a Connecting Link agreement. The route was first established in 1935, though it remained unnumbered on the 1935 and 1936 official road maps. By 1937 it extended from Port Colborne to St. Catharines, though the route it travelled between those places shifted several times over the following 30 years. In the late 1990s, the Ministry of Transportation of Ontario (MTO) transferred several highways or portions of highways throughout the province to lower levels of government. Highway 58 was decommissioned through Welland on April 1, 1997. == 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. The remaining segments vary between a two-lane rural highway and four-lane urban roadway. Overall, the highway is in length, with a gap separating the two sections.〔〔 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.〔(【引用サイトリンク】 publisher = Brent Huffman, Toronto Zoo )〕 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)〔 The northern section of Highway 58 begins at an intersection with the western terminus of Highway 20, approximately east of Highway 406, within Thorold. 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 route 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 Thorold. 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.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ontario Highway 58」の詳細全文を読む スポンサード リンク
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