Unfalluntersuchung auf Versuchsstrecken mit modifzierter Seilleitschranke. Analyse des accidents sur trouçons d'essai équipés d'un dispositif de retenue à câbles modifié.

A comparison is made between different kinds of safety fences in the central reserve of motorways. Special attention is given on a safety fence with a second cable to prevent underride. In Switzerland three kinds of safety fences are used. An evaluation of the three systems is given.