1999. Hazard Summary. Tractor trailers have tipped over while dumping loads of crushed quarry stone fly ash foundry sand steel lathe turnings and other materials. There have been many such incidents most involving long-box units. Recently a driver was killed when he tried to enter the cab of his after the started to .
As end-dump truck bodies and/or semi-trailer dump rigs get longer instability of the vehicle gets higher and higher. With high instability comes more of a chance of trucks tipping over. This risk is greater in semi-trailer rigs than in straight due to the length of the semi-trailer rig.
As end-dump truck bodies and semi-trailer dumping rigs get longer the incidence of units tipping over has increased. This type of accident is more frequently connected with semitrailer rigs than with straight trucks. In the last couple of years one fatality and at least one serious injury have resulted when dump trucks tipped over.