No, this has nothing to do with car crashes. This roundabout used to be the most dangerous spot on the Western Front back in the First World War.
This short Australian film describes what was then known as Hell Fire Corner, an easy and constant target of German artillery. It was an intersection point for the twelve mile Ypres-Menin road, known as the Menin Road and the Ypres-Roulers railway crossed the road, as this website explains.
More information on Hell Fire Corner can be found at firstworldwar.com.