Cabover trucks are widely used in the United States for refuse collection, terminal tractors, and other vocational applications requiring a tight turning radius or frequent ingress/egress by the driver. Autocar, the oldest surviving motor vehicle manufacturer in America, produces primarily cabover trucks. Although cabover trucks were popular among United States heavy truckers and trucking companies during the 1970s because of strict length laws in many states, when those length laws were repealed, most heavy-truck makers moved to other body styles. One of the reasons is the Federal Bridge Formula, which is unique to the US, and encourages spreading out the load. If axle distances are too tight, the maximum load allowance is reduced. For COEs operated at maximum weight in the US, this required an axle directly behind the front bumper. This cab design caused an awkward climb into the cab for the driver, forcing them to climb up behind the front wheel, then moving to the front and into the cab. European or Chinese or Japanese truckers enter their cab in a straight fashion with handrails left and right.