A lightweight concrete vehicle crash cushion developed by engineers at Texas A and M University promises to significantly reduce traffic deaths caused by cars striking existing rigid obstacles, such as retaining walls and bridge abutments. The vermiculite concrete cushions are so soft that they can be dented with thumb pressure. They are designed to collapse in a controlled pattern under vehicle impact, cushioning the collision and stopping a vehicle at deceleration levels tolerable for occupants wearing seat belts. Crash tests at speeds or more than 60 miles per hour have verified the workability of the cushion. Barrier lengths can be chosen to suit operational traffic speeds designated on a given highway. The concrete cushions can be cast-in-place or precast in modular form. The modules weigh up to 250 pounds, which makes field installation and repair easy to accomplish.