Dundas Street , formerly known as Highway 5, is a major arterial road connecting the Canadian city of Toronto with its western suburbs and several cities in southwestern Ontario. Originally intended as a military route to connect the shipping port of York (now Toronto) to the envisioned future capital of London, Ontario, the street today connects Toronto landmarks such as Yonge-Dundas Square and the city's principal Chinatown to rural villages and the regional centres of Hamilton and London.