638 тас жолының тарихы мен сипаттамасы

Ontario provincial highway
On an average day, approximately 520 vehicles use the highway at the southern terminus, while approximately 420 vehicles use the highway at the northern terminus. These represent the heaviest and lightest travelled portions of the route, respectively. Sylvan Valley is locally renowned for "The Golden Mile", a long stretch of sunflowers planted annually alongside the highway by farmer Lynn Orchard since 2013. Rising out of the valley, Highway 638 enters thick boreal forests as it meanders eastward through an area dotted with small lakes. Gradually the forests give way to farmland as the route approaches the community of Leeburn. East of Leeburn the highway passes several large rock outcroppings before encountering Poplar Dale Road, where it turns south into Ophir. The Department of Highway (DHO), predecessor to the modern Ministry of Transportation (MTO), assumed the Bruce Mines–Dunn Valley Road on May 9, 1956. On March 29, 1962, Highway 638 was assumed, travelling from Echo Bay to Highway 561. In addition, the portion of Highway 561 between Ophir and Dunns Valley was renumbered as part of the new route; the section north of the Wanamaker Creek bailey bridge in Dunns Valley to Skookum Lake was decommissioned. This routing remained consistent until mid to late 1989, when the remaining of Highway 561 was renumbered as part of Highway 638. The segment of Highway 638 between Ophir and Dunns Valley was renumbered as Highway 670 at the same time. The portion of Highway 638 through Bruce Mines was transferred from the province to the town on January 1, 1998.

From 2007 to 2009, Highway 638 extended for an additional westerly from Echo Bay a junction with Highway 17 in Sault Ste. Marie. The extendion between Echo Bay and Sault Ste. Marie was the former alignment of Highway 17, the route of the Trans Canada Highway through the region. It was redesignated as part of Highway 638 when Highway 17 was rerouted along a four lane expressway alignment that opened on October 31, 2007. The former alignment of Highway 17 was renumbered, with the portion south of Echo Bay becoming Highway 638A, and the portion northwest of Echo Bay becoming an extension of Highway 638. However, the Garden River First Nation, citing a 1909 order in council whereby ownership of the highway reverts to the band after realignment, sought to have the route numbered as Highway 17B. The municipal council of Sault Ste. Marie passed a municipal resolution several weeks later which supported the position of Garden River. In 2008 both Highway 638A and the extension of Highway 638 were renumbered as Highway 17B.

The safety of the current at grade intersection at Highway 17 has been called into question by local residents. In February 2011, the Ministry of Transportation announced that this crossing will be upgraded to a full interchange.