Ontario Highway 140

Highway 140
Highway 140 highlighted in red
Route information
Maintained by the Ministry of Transportation of Ontario
Length	10.9 km[1] (6.8 mi)
Existed	October 5, 1972[2]–present
Major junctions
South end	Highway 3 in Port Colborne
Major intersections	Highway 58A – Townline Tunnel
North end	Main Street in Welland
Location
Country	Canada
Province	Ontario
Counties	Regional Municipality of Niagara
Major cities	Port Colborne, Welland
Highway system
Ontario provincial highways Current Former 400-series
← Highway 138 → Highway 141

King's Highway 140, commonly referred to as Highway 140, is a provincially maintained highway in the Canadian province of Ontario. The highway connects Port Colborne near Lake Erie with Highway 406 in Welland, via the Main Street Tunnel. It was constructed in the early 1970s as part of the Welland Bypass project of the Welland Canal, which resulted in the severance of several highways and rail lines. Opened to traffic in late 1972, several months following the tunnel, Highway 140 has remained unchanged since, despite growing calls to resign it as an extension of Highway 406.