The Semi-directional T junction with the QEW was built over and required the construction of 19 bridges and the equivalent of of two-lane roadway, with the two sets of flyovers (defaulting express lane traffic to the QEW and vice versa) soaring over the collector lanes to Browns Line (plus their connecting ramps to The Queensway and Evans Avenue). The junction with Highway 401 remains the largest interchange in Canada as it sprawls over and required the construction of 28 bridges and the equivalent of of two-lane roadway, being built around the existing Richview Memorial Cemetery, and including connections to Eglinton Avenue (ultimately meant for the proposed but never-built municipal Richview Expressway). The interchange with the QEW was opened to traffic on November 14, 1969, while the Highway 401 junction required several more years of construction staging, fully opening on December 4, 1971 (though portions were opened in the weeks prior to that), just prior to Highway 27's renumbering as Highway 427. The rest of the route was rebuilt prior to the completion of these interchanges.