Testing by Volvo determined that in a front-on collision the engine of a conventional cab ended up in the cabin crushing driver. This was the primary reason for

Testing by Volvo determined that in a front-on collision the engine of a conventional cab ended up in the cabin crushing driver. This was the primary reason for CoE adoption in Europe. Similar to cars before safety cells and crumple zones became the norm. Common perception in America (contrary to actual testing) believed having all that bulk in front made a conventional truck safer.