The study findings support the debate of drivers cutting the curve short, which can result in run-off road crashes on the inside of the curve as well as head-on and opposite direction-sideswipe crashes with oncoming vehicles.
A review of the crash history has identified that the run-off-road crash is one of key crash types in Queensland, Australia.
After rumble strips were installed on the 641-mile thruway system in 1996, the number of "run off road" crashes dropped sharply.
A 1997 report by the National Sleep Foundation said that rumble strips prevented from 15 to 70percentt of "run off road" crashes, depending on the estimate, and it recommended their use on all rural Interstates and similar highways.
Even so, one-third of all vehicle-related injuries, off-road cases and crashes in non-public areas, usually are not included in STRADA, however with some exemptions as snowmobile and ATV off road crashes.
It is noted that off-road crashes were not included in any of the national police accident reporting systems.
Lane departures are responsible for many side-swipe, rear-end and single-vehicle run-off-road crashes.
For example, at site PP1, almost all accidents were run-off-road crashes and problems concerning alignment, road consistency, speeding, skidding risk, drivers' perception were highlighted.
As expected the results suggest a strong safety benefit for the ran-off-road crashes by reducing the number of severe crashes (fatal and injury).
A roadside guardrail system is anchored in gravel beside a roadway to eliminate the risk of fatal accidents during off-road crashes and collisions with hazardous roadside objects.
Alcohol was a reported factor in a sizeable proportion of run-off-road crashes occurring on ramps (14%) and ramp margins (30%).
