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King's Highway 427 (pronounced "four twenty-seven"), also known as Highway 427 and colloquially as the 427, is a 400-series highway in the Canadian province of Ontario that connects the Queen Elizabeth Way (QEW) and Gardiner Expressway with York Regional Road 7 (formerly Highway 7) via Highway 401. An arterial extension, known as York Regional Road 99, continues north to Zenway Boulevard. It is Ontario's second busiest freeway by volume and third busiest in North America, behind Highway 401 and Interstate 405 in California.〔 Like Highway 401, a portion of the route is divided into a collector-express system with twelve to fourteen continuous lanes. Notable about Highway 427 are its several multi-level interchanges; the junctions with QEW and Highway 401 are two of the largest interchanges in Ontario and were constructed between 1967 and 1971, while the interchanges with Highway 409 and Highway 407 are more recent and were completed in 1992 and 1995, respectively. Highway 427 is the main feeder to Toronto Pearson International Airport from the north and south. However, while much of the traffic comes from Highway 407, Highway 401 (eastbound), and the QEW / Gardiner Expressway makes use of the freeway for airport access, it serves the western portion of Etobicoke, the northeastern portion of Mississauga (Malton), the southeastern portion of Brampton, and the western portion of Vaughan (Woodbridge). The section between Highway 401 and Dundas Street is a heavily traversed transit corridor; GO Transit, MiWay, and the Toronto Transit Commission (TTC) all operate express buses along this section of the highway. First designated in 1972, Highway 427 follows what was originally a two lane roadway known as Highway 27, as well as a short freeway north of Highway 401 known as the Airport Expressway. Both routes were upgraded throughout the 1950s and 1960s, eventually becoming intertwined into the present configuration in 1972. The freeway was extended north from Pearson Airport to Highway 7 over the following twenty years. A short arterial extension was later built, though this section is designated as York Regional Road 99 (Zenway Boulevard). Plans have been announced to extend Highway 427 north to Major Mackenzie Drive with funding beginning in 2017; no further timeline has been provided as of 2015. == Route description == Highway 427 is the second busiest freeway in Canada with an average of 300,000 vehicles that use it between the QEW and Highway 401 per day. The section between Burnhamthorpe Road and Rathburn Road has an annual average daily traffic (AADT) count of 353,100. The route is long.〔 At its southern terminus, the route begins at Coules Court, where Brown's Line becomes Highway 427.〔 Alderwood Plaza, located on the east side of the route, has a parking lot which provides access to the highway; this is the only at-grade access along the length of the route. The four lane road splits into a divided highway and descends below Evans Avenue. The highway weaves through a complicated interchange, providing northbound access to Evans Avenue and the Gardiner Expressway, and southbound access to The Queensway, QEW / Gardiner Expressway, and Evans Avenue. North of the interchange, the lanes from Brown's Line diverge and form the collector lanes of a collector-express system. Flyover ramps to and from the QEW / Gardiner pass over the southbound lanes and converge to form the express lanes. This collector-express system serves to divide local traffic from freeway-to-freeway traffic; the express lanes provide access between the QEW / Gardiner Expressway and Highway 401, while the collector lanes provide local access between those interchanges. After crossing Canadian Pacific Railway (CPR) tracks, the freeway interchanges with Dundas Street. A set of criss-crossing ramps provide access between the collector and express lanes north of here,〔 referred to as The Basketweave. The highway passes beneath Bloor Street West but does not provide direct access. Instead, it provides ramps to parallel arterial roads; The East Mall and The West Mall run parallel with the freeway from Evans Avenue to Rathburn Road.〔 A full interchange is provided shortly after with Burnhamthorpe Road, southwest of Burnhamthorpe Collegiate Institute. Across from the college, an offramp provides access from the southbound lanes to Holiday Drive and The West Mall. Following the offramp, to the north, is a partial interchange with Rathburn Road, which provides access from the northbound lanes and to the southbound lanes.〔 Transfers provide a second and final opportunity to cross between 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 collectors diverge, and the express lanes cross the southbound collectors. The collector lanes provide access to and from Eglinton Avenue then transition into Highway 27, while the express lanes interchange with Highway 401 and continues the route of Highway 427 north. The Highway 427 express lanes and flyover ramps to/from Highway 401 are constructed around the Richview Memorial Cemetery.〔 Highway 427 passes through the sprawling interchange and becomes displaced approximately to the west. Despite its size, 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 Pearson 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 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 West, the first and last interchange with the route. 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, it 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.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ontario Highway 427」の詳細全文を読む スポンサード リンク
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