A viaduct is a specific type of bridge that consists of a series of arches, piers, or columns supporting a long elevated railway or road. Typically a viaduct connects two points of roughly equal elevation allowing passage over a valley, road, river, or other low-lying feature or obstruction. The term viaduct is derived from the Latin via for road and ducere, to lead. It is a nineteenth-century derivation from an analogy with ancient Roman aqueducts. Like the Roman aqueducts, many early viaducts comprised a series of arches of roughly equal length.
The Frederick G. Gardiner Expressway, commonly known as the Gardiner Expressway or simply the Gardiner, is a municipal expressway in Toronto, Ontario, Canada. Running close to the shore of Lake Ontario, it extends from the foot of the Don Valley Parkway (DVP) in the east, just past the mouth of the Don River, to the junction of Highway 427 and the Queen Elizabeth Way (QEW) in the west, for a total length of 18.0 kilometres (11.2 mi). East of Dufferin Street to just east of the Don River, the roadway is elevated for a length of 6.8 kilometres (4.2 mi), unofficially making it the longest bridge in Ontario. It runs above Lake Shore Boulevard east of Spadina Avenue.
The Don River is a watercourse in southern Ontario, that empties into Lake Ontario, at Toronto Harbour. Its mouth was just east of the street grid of the town of York, Upper Canada, the municipality that evolved into Toronto, Ontario. The Don is one of the major watercourses draining Toronto that have headwaters in the Oak Ridges Moraine.
The Don Valley Parkway (DVP) is a municipal expressway in Toronto, Ontario, Canada which connects the Gardiner Expressway in downtown Toronto with Highway 401. North of Highway 401, it continues as Highway 404. The parkway runs through the parklands of the Don River Valley, after which it is named. It has a maximum speed limit of 90 km/h (56 mph) for its entire length of 15.0 km (9.3 mi). It is six lanes for most of its length but it is eight lanes north of York Mills and four lanes south of Eastern. As a municipal road, it is patrolled by the Toronto Police Service.
The Prince Edward Viaduct System, commonly referred to as the Bloor Viaduct, is the name of a truss arch bridge system in Toronto, Ontario, Canada, connecting Bloor Street East, on the west side of the system, with Danforth Avenue on the east. The system includes the Rosedale Valley phase and the Sherbourne Phase, an embankment built to extend Bloor Street East to the Rosedale Ravine from Sherbourne Street. The Don Valley phase of the system, the most recognizable, spans the Don River Valley, crossing over the Bayview Avenue Extension, the Don River, and the Don Valley Parkway.
William R. Allen Road, also known as Allen Road and The Allen, is a short expressway and arterial road in Toronto, Ontario. It starts as a controlled-access expressway at Eglinton Avenue West, heading north to just south of Transit Road, then continues as an arterial road north to Kennard Avenue, where it continues north as the northern portion of Dufferin Street. Allen Road is named after late Metro Toronto chairman William R. Allen and is maintained by the City of Toronto. Landmarks along the road include the Lawrence Heights housing project, Yorkdale Shopping Centre and Downsview Park. A section of the Toronto subway Line 1 Yonge–University is located within its median from Eglinton Avenue to north of Wilson Avenue, and briefly runs parallel to it underground in the vicinity of Sheppard Avenue.
The cancelled expressways in Toronto were a planned series of expressways in Toronto, Ontario, Canada that were only partially built or cancelled due to public opposition. The system of expressways was intended to spur or handle growth in the suburbs of Toronto, but were opposed by citizens within the city of Toronto proper, citing the demolition of homes and park lands, air pollution, noise and the high cost of construction. The Spadina Expressway, planned since the 1940s, was cancelled in 1971 after being only partially constructed. After the Spadina cancellation, other expressway plans, intended to create a 'ring' around the central core, were abandoned.
Bloor Street is a major east–west residential and commercial thoroughfare in Toronto, Ontario, Canada. Bloor Street runs from the Prince Edward Viaduct, which spans the Don River Valley, westward into Mississauga where it ends at Central Parkway. East of the viaduct, Danforth Avenue continues along the same right-of-way. The street, approximately 25 kilometres (16 mi) long, contains a significant cross-sample of Toronto's ethnic communities. It is also home to Toronto's famous shopping street, the Mink Mile.
Hoggs Hollow Bridge, originally known as the Yonge Boulevard Viaduct, is a set of four separate highway bridges that span the Don River Valley in Toronto, Ontario, Canada, and carries 14 lanes of Highway 401. The four structures are the busiest multi-span bridge crossing in North America, surpassing the Brooklyn Bridge.
Highway revolts are organized protests against the planning or construction of highways, freeways, expressways, and other civil engineering projects that favor vehicles.
The Macombs Dam Bridge is a swing bridge across the Harlem River in New York City, connecting the boroughs of Manhattan and the Bronx. The bridge is operated and maintained by the New York City Department of Transportation (NYCDOT).
The Sir Isaac Brock Bridge is a steel Warren truss bridge in Toronto, Ontario, Canada. It lies along Bathurst Street over the railway tracks between Front Street and Fort York Boulevard. The bridge carries four lanes for motor vehicles with the centre lanes containing the streetcar tracks of the Toronto Transit Commission's 511 Bathurst streetcar route.
The Queen Street Viaduct in Toronto, Canada carries vehicles and Toronto Transit Commission streetcars along Queen Street East and across the Don River. It is an example of a Pratt truss.
Eastern Avenue is an east-west street in Toronto, Ontario, Canada. It runs from just east of Parliament Street in the downtown to just west of Coxwell Avenue, near the Beaches neighbourhood. Originally Eastern crossed the Don River at the Old Eastern Avenue Bridge, but that bridge was disconnected in 1964. Today, Eastern's east and west halves cross the Don River north of the old alignment via a large bridge with ramps connecting to the Don Valley Parkway, and this viaduct forks out and becomes the eastern terminus of both Richmond and Adelaide streets.
The Hill to Hill Bridge is a road crossing of the Lehigh River linking the south and north sides of Bethlehem, Pennsylvania. Completed in 1924, the bridge carries Pennsylvania Route 378 from Wyandotte Street on the city's south side to a series of ramps and viaducts on the north side. It replaced a two-lane covered bridge and eliminated several grade crossings of three railroads on the two banks of the Lehigh River. The Hill to Hill Bridge is located in the Central Bethlehem Historic District, listed on the National Register of Historic Places in 1972, with a Boundary Increase in 1988.
The Rosedale Valley Bridge is a covered arch bridge in the northeast of Downtown Toronto, Ontario. Built in 1966 by architect John B. Parkin, the concrete bridge carries Line 2 trains of the subway across the Rosedale Ravine.
Dundas Street, is a major historic arterial road in Ontario, Canada. The road connects the city of Toronto with its western suburbs and several cities in southwestern Ontario. Three provincial highways—2, 5, and 99—followed long sections of its course, although these highway segments have since been downloaded to the municipalities they passed through. Originally intended as a military route to connect the shipping port of York to the envisioned future capital of London, Ontario, the street today connects Toronto landmarks such as Yonge-Dundas Square and the city's principal Chinatown to rural villages and the regional centres of Hamilton and London.
