Construction of the Toronto Bypass began near Yonge Street in 1949 (along present-day Highway 401) and on the four-laning of Highway 27 in 1953. The Highway 27 work involved the construction of two interchanges: a three-way stack at Highway 401 and a large cloverleaf at the QEW, the latter of which would become one of the worst bottlenecks in the province a decade after its completion, according to Minister of Transportation Charles MacNaughton. By September 1956, it was possible to bypass Toronto entirely on the four lane divided highway composed of Highway 401 and Highway 27. Highway 401 was extended to the west soon after, but Highway 27 remained a two-lane highway north of it.