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A median strip, central reservation, roadway median, or traffic median is the reserved area that separates opposing lanes of traffic on divided roadways such as divided highways, dual carriageways, freeways, and motorways. The term also applies to divided roadways other than highways, including some major streets in urban or suburban areas.
An Interstate Highway under construction , with both directions of traffic moved to one side of the roadway I-94 in Michigan, showing examples of non-interchange overpass signage in median, upcoming exit signage on right shoulder, a pre-1960 overpass with height restriction signage, newly installed cable median barrier, and parallel grooved ...
The American Association of State Highway and Transportation officials (AASHTO) provides a table from which desired superelevation rates can be interpolated, based on the designated speed and radius of a curved section of roadway. This table can also be found in many state roadway design guides and manuals in the U.S.
In the cases where a new motorway acts as a bypass of a state highway route, the original state highway is either stripped of that status or renumbered. A low road number means a road suitable for long-distance driving. In Belgium, motorways but also some dual carriageways have numbers preceded by an A. However, those that also have an E-number ...
This section of highway was for many years marked as US 3 and "To I-93", but these have now been replaced with regular I-93 signs. The Federal Highway Act of 1973 exempts this 7.6-mile (12.2 km) stretch from the Interstate Highway standards that apply elsewhere, and this highway is considered to be I-93 for all practical purposes. [19]
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 ...
Under Texas Transportation Code section 545.058, motorists are allowed to drive on the shoulder right of the highway to: Stop, stand or park. Accelerate before entering the main traveled lane of ...
Traffic islands can be used to reduce the speed of cars driving through, [1] or to provide a central refuge to pedestrians crossing the road. When traffic islands are longer, they are instead called traffic medians, a strip in the middle of a road, serving the divider function over a much longer distance. [2] Refuge island in Lisbon, Portugal