Like the “water curtain” setup, the snow fence can be used to examine how test subjects react to and avoid an obstacle. A commercially available snow catch fence is set up at the side of the road. The far end of the fence is suddenly pulled into the vehicle’s path with a bungee cord. This prompts the test subject to swerve in order to avoid this sudden obstacle.

The entire fence/cord construction is very lightweight and elastic so that driving over it will not cause serious damage to the test vehicle.


Snowfence with car     Fangzaun.jpg

Snow Fence

Video about the "snow fence technique"
Investigation of reactivity capacity and avoidance behaviour