Transfers provide a second and final opportunity to cross between the express and collector lanes, or vice versa, south of the complicated Highway 401 interchange. A final set of ramps along the collector-express system provides access to and from the southbound lanes and Eringate Drive, after which the collector lanes diverge, and the express lanes cross the southbound collector lanes. The collector lanes provide access to and from Eglinton Avenue, then transition into Highway 27, while the express lanes interchange with Highway 401 and continue the route of Highway 427. The Highway 427 express lanes and flyover ramps to and from Highway 401 are constructed around the Richview Memorial Cemetery. Highway 427 passes through the sprawling Highway 401 interchange and becomes displaced approximately to the west. There are no ramps to provide access from southbound Highway 427 to eastbound Highway 401 and vice versa, as this connection is handled by Highway 409. Highway 427 crosses Renforth Drive and then curves to the east of Runway 24R 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 Highway 409, which provides access to the airport as well as the southbound to eastbound movement that cannot be performed at the interchange with Highway 401 to the south. Highway 427 continues straight north and narrows again to six lanes. After crossing the Kitchener GO line, it passes west of Woodbine Racetrack and beneath Rexdale Boulevard, Morning Star Drive, and Finch Avenue. The freeway bends slightly eastward, diverging from the Mississauga–Toronto boundary, and crosses the West Humber River where it drains from Claireville Reservoir. Approaching the fourth and final sprawling interchange, the highway crosses Steeles Avenue and enters Vaughan. It passes beneath Highway 407 and crosses through an undeveloped area before terminating at its final interchange with Highway 7. The mainline continues north as a four-lane arterial road to Zenway Boulevard and is designated as York Regional Road 99, which is slated to be removed when the extension of the highway opens in 2020. Although Highway 427 was not officially designated until 1972, several sections of freeway were already in place prior to that date.