Vehicle rollover
Tripped rollovers are caused by forces from an external object, such as a curb or a collision with another vehicle.
The most common type of tripped rollover in light passenger vehicles occurs when a vehicle is sliding sideways, and the tires strike a curb, dig into soft ground, or a similar event occurs that results in a sudden increase in lateral force.
In 1983, crash tests showed that light trucks were prone to rolling over after colliding with certain early designs of guide rail.
Strong winds may cause high-sided vehicles such as trucks, buses and vans to be blown over.
Full-size vans don't usually have off-road suspensions, but their increased body height makes them more prone to tip.
Fifteen passenger vans such as the Ford E-Series (at 27.9%[11]), are particularly notorious for rolling over because their height is increased by the heavy-duty suspensions necessary to carry large numbers of people.
It is recommended to not load anything on the roof of such vans, and to use drivers experienced or trained in safe operation of the vehicle.
Among the vehicles which have received publicity for tendencies to roll over are the Ford Bronco II, Suzuki Samurai, Jeep CJ, Mitsubishi Pajero/Montero, and Isuzu Trooper.
Military vehicles have a much wider wheel track than civilian SUVs, making them more difficult to roll over.
The bus swerved, flipped on its side and hit a pole which split off the top of the vehicle.
[13] Vehicles sold in the United States, sorted by risk as evaluated by the U.S. National Highway Traffic Safety Administration.
After a rollover, the vehicle may end up lying on its side or roof, often blocking the doors and complicating the escape for the passengers.
[citation needed] Rollover crashes are particularly deadly for the occupants of a vehicle when compared to frontal, side, or rear crashes, because in normal passenger vehicles, the roof is likely to collapse in towards the occupants and cause severe head injuries.
The Jeep Wrangler, a vehicle which is short, narrow, and designed to be used on uneven terrain, is unusual in that it comes with a roll bar as standard equipment.
[citation needed] Some countries have a unique traffic warning sign for curves and other areas with an increased danger of rollover for trucks and other vehicles with high centers of gravity.
When the occupant is not ejected from the vehicle and the car does not strike any rigid objects, rollovers are the least injurious of the different impact types, because deceleration is longer and slower.
[49] Nonetheless, rollover risk depends upon the centre of gravity, suspension characteristics and loads carried.
Moreover, the belt wearing rate in the US, particularly in those vehicles prone to rollover, is lower than in European countries.
Finally, there are differences in legislation which affect vehicle design and/or driver behavior.Within European union, it is considered that HGV rollovers do not usually result in serious injury.
