collectors. The collector lanes cross Eglinton Avenue at a half-cloverleaf interchange and then dives under Highway401 while transitioning into Highway27, while the express lanes interchange with Highway401 and continue the route of Highway 427. The Highway 427 express lanes and ramps connecting to Highway 401 are constructed around the Richview Memorial Cemetery. Highway427 passes through the sprawling Highway 401 interchange and becomes displaced approximately to the west. There are no ramps to provide access from southbound Highway427 to eastbound Highway401 and vice versa, as this connection is handled by Highway 409. Highway 427 crosses Renforth Drive and then curves to the east of Runway24R and 24L of Toronto Pearson International Airport. Shortly thereafter, it crosses and interchanges with Dixon Road and Airport Road, between which it forms the demarcation line. Several ramps diverge at this point to provide access to Pearson Airport, and the freeway narrows to eight lanes. From here to just south of Finch Avenue, the freeway follows the boundary line between Toronto and Mississauga. It encounters the third multi-level junction along its length, with Highway409, which provides access to the airport as well as the southbound to eastbound movement that cannot be performed at the interchange with Highway401 to the south. Highway427 continues straight north and narrows again to six lanes. After crossing the Kitchener GO line, it passes west of Woodbine Racetrack and interchanges with Rexdale Boulevard/Derry Road and Finch Avenue. The freeway bends slightly eastward, diverging from the Toronto/Mississauga boundary to briefly run exclusively through Toronto again. It crosses the West Humber River where it drains from Claireville Reservoir. The highway crosses Steeles Avenue and enters Vaughan, as it approaches a fourth and final sprawling interchange with Highway407. It then interchanges with Highway 7 (York Regional Road 7), Langstaff Road (Regional Road 72), Rutherford Road (Regional Road 73), and ends at a trumpet interchange with Major MacKenzie Drive(Regional Road 25). History QEW to Highway 401 (1953–1956) Although Highway 427 was not officially designated until 1972, several sections of freeway were already in place prior to that date. The designation was applied following the completion of the interchanges at the QEW and Highway401 as well as the expansion of the section between them into a collector-express system. Highway27 was designated as a two-lane road travelling north from Highway 2 (Lake Shore Boulevard) towards Barrie. As Toronto grew outwards following the annexation of various municipalities, the Ontario