The noticeable difference between tractor units in Europe and North America is that almost all European models are cab over engine (called "forward control" in England), while the majority of North American trucks are "conventional" (called "normal control" or "bonneted" in England). European trucks, whether straight trucks or fully articulated, have a sheer face on the front. This allows shorter trucks with longer trailers (with larger freight capacity) within the legal maximum total length. Furthermore, it offers greater maneuverability in confined areas, a more balanced weight-distribution and better overall view for the driver. The major disadvantage is that for repairs on COE trucks, the entire cab has to hinge forward to allow maintenance access. Conversely, "conventional" cab tractors offer the driver a more comfortable driving environment, easier access getting in or out and better protection in a collision.