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By allowing pedestrians and bicycles to cross over the highway, these bridges were viewed as low-cost alternatives to intersections. In 1999, Las Vegas, Nevada began a major effort to install pedestrian bridges at major intersections along the Las Vegas Strip, to reduce traffic congestion and improve pedestrian safety. [1]
Grade-separated road junctions are typically space-intensive, complicated, and costly, due to the need for large physical structures such as tunnels, ramps, and bridges. Their height can be obtrusive, and this, combined with the large traffic volumes that grade-separated roads attract, tend to make them unpopular to nearby landowners and residents.
A footbridge (also a pedestrian bridge, pedestrian overpass, or pedestrian overcrossing) is a bridge designed solely for pedestrians. [1] While the primary meaning for a bridge is a structure which links "two points at a height above the ground", a footbridge can also be a lower structure, such as a boardwalk , that enables pedestrians to cross ...
Roads outside built-up areas, also known as rural roads not including motorways, are roads which are not classified as urban road and which are not classified as motorway. In the European Union, this is the kind of road with the most people killed (54.3%) in 2015, more than inside urban areas (36.8%). [ 49 ]
Traffic barrier with a pedestrian guardrail behind it. Traffic barriers (known in North America as guardrails or guard rails, [1] in Britain as crash barriers, [2] and in auto racing as Armco barriers [3]) keep vehicles within their roadway and prevent them from colliding with dangerous obstacles such as boulders, sign supports, trees, bridge abutments, buildings, walls, and large storm drains ...
Stressed Ribbon pedestrian bridge over the Rogue River, Grants Pass, Oregon Prestressed concrete cable-stayed bridge over Yangtze river Reinforced concrete is concrete in which steel reinforcement bars ( rebars ) or fibers have been incorporated to strengthen a material that would otherwise be brittle .
A bridge can be categorized by what it is designed to carry, such as trains, pedestrian or road traffic (road bridge), a pipeline (Pipe bridge) or waterway for water transport or barge traffic. An aqueduct is a bridge that carries water, resembling a viaduct, which is a bridge that connects points of equal height.
In civil engineering, clearance refers to the difference between the loading gauge and the structure gauge in the case of railroad cars or trams, or the difference between the size of any vehicle and the width/height of doors, the width/height of an overpass or the diameter of a tunnel as well as the air draft under a bridge, the width of a lock or diameter of a tunnel in the case of watercraft.