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 direct overpass across a wide valley, road, river, or other low-lying terrain features and obstacles. The term viaduct is derived from the Latin via meaning "road", and ducere meaning "to lead". It is a 19th-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 partially at grade and elevated 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.
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, with eight lanes north of York Mills Road and four lanes south of Eastern Avenue. 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.
Gerrard Street is a street in Toronto, Ontario, Canada. It consists of two separate parts, historically referred to as Lower Gerrard and Upper Gerrard. The former stretches between University Avenue and Coxwell Avenue for 6 km, across Old Toronto. The latter portion starts 300 m north of Lower Gerrard's eastern terminus and runs between Coxwell Avenue and Clonmore Drive, between Victoria Park Avenue and Warden Avenue, in Scarborough for another 4 km.
The Ross Island Bridge is a cantilever truss bridge that spans the Willamette River in Portland, Oregon. It carries U.S. Route 26 across the river between southwest and southeast Portland. The bridge opened in 1926 and was designed by Gustav Lindenthal and honors Oregon pioneer Sherry Ross. It is named for its proximity to Ross Island. Although it looks like a deck arch bridge, it is a cantilever deck truss bridge, a rare type in Oregon.
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.
Danforth Avenue and Danforth Road are two historically-related arterial streets in Toronto, Ontario, Canada. Danforth Avenue is an east-west street that begins in Old Toronto at the Prince Edward Viaduct as a physical continuation of Bloor Street and continues for about 6 kilometres (3.7 mi) east through old Toronto, about 350 metres (1,150 ft) of old East York, and a further 5 kilometres (3.1 mi) in Scarborough until it intersects with Kingston Road via a ramped interchange. Danforth Road splits off the Avenue west of Warden Avenue and runs diagonally northeast until south of Lawrence Avenue, where it continues as McCowan Road.
Hoggs Hollow Bridge, originally known as the Yonge Boulevard Viaduct, is a set of four separate highway bridges that span the West Branch of 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 which prioritize motor vehicle traffic over pedestrian movement or other considerations.
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.
Sheppard Avenue Bridge is an under deck Truss bridge that spans the Don River on Sheppard Avenue West, just east of Bathurst Street in Toronto, Ontario, Canada. Built in 1954, the bridge has a scenic view of the West Don River and Earl Bales Park. The current bridge replaced an old concrete bridge that was damaged during Hurricane Hazel and required cars to descend down the valley.
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.
King's Highway 11A, commonly referred to as Highway 11A, was the highway designation for an alternate route of Highway 11 in the Canadian province of Ontario. The north-south route paralleled Highway 11 within Toronto, serving as a secondary access to Downtown Toronto. It began at the York exit of the Gardiner Expressway (Highway 2) and travelled north on York Street to Front Street, where it transitioned onto University Avenue. It continued north on University Avenue to Queen's Park, where Highway 11A followed Queen's Park Crescent, encircling the Ontario Legislative Building, before continuing along Avenue Road. Highway 11A travelled along Avenue Road to Upper Canada College. It followed Lonsdale Road, Oriole Parkway, and Oxton Avenue around the campus and back to Avenue Road, which resumes north of the school. It continued north along Avenue Road to Highway 401, ending just north of the highway at Bombay Avenue.
The Rosedale Valley Bridge is a covered arch bridge located in the northeast part 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.
