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The ET-Plus Guardrail system is a guardrail end terminal system manufactured by Trinity Highway Products, based in Dallas, Texas. The ET-Plus was designed at the Texas A&M Transportation Institute and built by Trinity. The end terminal cap absorbs the impact of a crash. The wooden posts break and the guardrail collapses. [3]
Lastly, a vehicle can become airborne upon striking a guardrail with a buried end treatment if the slope to which the end anchor is buried is relatively flat (3:1 or flatter), which may negate the purpose of the guardrail, if the vehicle continues beyond the guardrail and strikes the object the guardrail was protecting.
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 ...
This movement is known as the dynamic deflection. Given the lack of tension in the system, individual installations, or “runs”, of cable are limited to 2,000 ft (600 metres) with an anchor assembly at each end. Due to the low tension of the system, the cables tend to lie on the ground in the event that an impact damages multiple posts.
Another example is the Milwaukee Road "R08" nail, where the "R" is an unknown treatment or type of wood, and the numbers indicate the year it was installed. [3] Date nail use has dropped dramatically since the mid-20th century and the advent of more modern maintenance of way equipment. Date nails on American railroads were phased out in the 1970s.
A guide rail is a system designed to guide vehicles back to the roadway and away from potentially hazardous situations. [4] There is no legal distinction between a guide rail and a guard rail . According to the US Federal Highway Administration , the terms guardrail and guiderail are synonymous.