EN 1317–3

EN 1317–3 covers requi­re­ments for crash cus­hions, how they shall be tested and how their pro­per­ti­es are to be described.

Speed class

The crash cus­hions abi­li­ty to stop an errant vehic­le is descri­bed by its per­for­man­ce level.

Test

The stan­dard defi­nes 18 dif­fe­rent tests for crash cus­hions. The­se are named TC (Test Crash cus­hion) follo­wed by a three digit num­ber. The first figu­re tells the appro­ach (1 to 5), the second type of vehic­le (1 – 900 kg car, 2 – 1300 kg car and 3 – 1500 kg car) and the third and last tells the test speed (50, 80, 100 or 110 km/h).

Examp­le:

TC 1.1.50: TC (Test Crash cus­hion), Test 1, vehic­le type 1 (car 900 kg), 50 km/h
TC 3.3.110: TC (Test Crash cus­hion), Test 3, vehic­le type 3 (car 1500 kg), 110 km/h

Tests using appro­ach 4 and 5 are only per­for­med on redirecti­ve crash cus­hions, a type requi­red in Sweden.

Impact seve­ri­ty level

The Impact seve­ri­ty level gives an assess­ment of how safe a crash cus­hion is for occu­pants in an impacting vehic­le. The­ra are two levels, A and B. Impact seve­ri­ty level A is the safest for occu­pants in an impacting vehicle.

Most crash cus­hions ful­fil requi­re­ments for impact seve­ri­ty level B. In Swe­den both impact seve­ri­ty lever A and B are accepted.

Class of late­ral displacement

The per­ma­nent late­ral dis­pla­ce­ment of the crash cus­hion shall be as shown in the tab­le below. In the per­ma­nent late­ral dis­pla­ce­ment also deta­ched parts equal to or gre­a­ter than 2 kg are included.

In Swe­den the class of late­ral dis­pla­ce­ment shall be cho­sen in such a way that a defor­med (impac­ted) crash cus­hion does not intru­de on adja­cent car­ri­a­ge­ways or covers more than the wid­th of adja­cent pedestrian/bicycle pat­hs minus one meter.

Redirec­tion zone class

The redirec­tion zone class descri­bes how an impacting vehic­le per­forms after col­li­ding with the crash cushion.

In Swe­den only redirec­tion zone clas­ses Z1 and Z2 are accep­ted wit­hout a spe­ci­al per­mit from the Swe­dish Trans­port Administration.