Dolly rollover leer. (SAE Paper No 9Xi166) Among the dynamic maneuvers a motor vehicle can experience, rollover is one of the most serious and threatening to the vehicle occupants. Rollover may be defined as any maneuver in which the vehicle rotates 90 degrees or more about its longitudinal axis such that the body makes contact with the ground, Rollover may be precipitated from one or a combination of factors, It may occur on flat and level surfaces when the lateral accelerations on a vehicle reach a level beyond that which can be compensated by lateral weight shift on the tires. Cross slope of the road(or off-road) surface may contribute along with disturbances to the lateral forces arising from curb impacts, soft ground, or other obstructions that may"trip" the vehicle. The rollover process is one that involves a complex interaction of forces acting on and within the vehicle, as influenced by the maneuver and roadway The procesk has been investigated analytically and empirically using models that cover a range of complexities. The process is most easily understood by starting with the fundamental mechanics involved in a quasi static case