CRASH BARRIERS THAT SOAK UP PUNISHMENT

In this article a new safer design of energy absorbing crash barrier developed by Road Research Ltd is described. There are two designs; one for bridge parapets and the other for central reservations, but both are based on the same principle. The problem with existing crash barriers is pointed out as being their inflexibility. The new design is described as taking advantage of the backward movement of the barrier on impact. Each post in the barrier is fitted with a fairly simple hydraulic ram. The impact of a car forces the piston of the ram into the cylinder, against a hydraulic pressure. The horizontal beam is raised as it moves back and so the car will not overturn or jump the barrier. Improved performance is due to the hydraulic absorption of impact energy; the harder the impact of the car, the faster the pressure in the hydraulic ram builds up, and the harder the braking force on the car. Because the impact energy is absorbed the car is not thrown back into the road. The article concludes by stating that this new barrier costs little more than conventional types. /TRRL/

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    IPC Magazines

    66-69 Great Queens Street
    London WC2E 5DD,   England 
  • Publication Date: 1975-7-10

Media Info

  • Features: Photos;
  • Pagination: p. 85
  • Serial:
    • NEW SCIENTIST
    • Volume: 67
    • Issue Number: 957
    • Publisher: REED BUSINESS INFORMATION LTD
    • ISSN: 0262-4079

Subject/Index Terms

Filing Info

  • Accession Number: 00127918
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Dec 29 1975 12:00AM