Mechanical & Materials Engineering, Department of


Date of this Version



United States Patent Rohde et al. Patent No . : US 9 , 732 , 484 B2


A highway crash attenuation system having W - beam rail elements attached to a plurality of vertical posts . An impact terminal with a feeder chute guides one or more of the W - beam rail elements through the impact terminal . The feeder chute has an impact shield extending along a traffic facing side of the chute from an upstream - most end to a downstream - most end of the chute closing the traffic - facing side of the chute . The system also has an anchor cable release mechanism for releasing the cable downstream of the first vertical post and an improved first breakaway post.