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Jersey barriers on the road. A Jersey barrier, Jersey wall, or Jersey bump is a modular concrete or plastic barrier employed to separate lanes of traffic.It is designed to minimize vehicle damage in cases of incidental contact while still preventing vehicle crossovers resulting in a likely head-on collision.
Concrete median barrier on the N11 road near Dublin, Ireland. An August 1993 study by the US Federal Highway Administration quantified the correlation between median width and the reduction of both head-on accidents and severe injuries. The study found that medians without barriers should be constructed more than 30 feet (9.1 m) wide in order ...
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 ...
Median width: The median should have a width of least 50 feet (15 m), and preferably 60 feet (18 m), in rural areas, and 10 feet (3.0 m), plus a barrier, in urban or mountainous areas. Recovery areas : There should be no fixed objects in the clear zone , the width of which should be determined by the design speed in accordance with the current ...
In this view, CARE's definition stands that a motorway is understood as a . public road with dual carriageways and at least two lanes each way. All entrances and exits are signposted and all interchanges are grade separated. Central barrier or median present throughout the road. No crossing is permitted, while stopping is permitted only in an ...
Concrete barrier may refer to: Alaska Barrier; Bremer barrier; Traffic barrier; Concrete step barrier; Constant-slope barrier; F-Shape barrier; Jersey barrier
Crash barriers are now mandatory for such routes, and wire cabling or full crash barriers (depending on whether or not the route is a motorway, and median width) have been fitted to existing routes. Between 2000 and 2010, three major types of dual carriageway were built on national road schemes in Ireland:
When a lane closure must also be a physical barrier against cars accidentally crossing it, a Fitch barrier, in which the barrels are filled with sand, or a Jersey barrier is used. In many countries such as Australia and in some American states such as California , traffic barrels are rarely seen; pillar-shaped moveable bollards are instead used ...