Even though most intersection crashes involve two-way stop controlled intersections, most research investigated vehicle acceleration profiles within controlled environments such as traffic signal controlled intersections. A prerequisite for the determination of crash avoidance is knowledge of the time that is available to a driver. In a path intrusion crash scenario, a method to determine the time available for a major road driver is to know the time a minor road driver accelerated before impact. Picking up on this gap in research, KEI engineers conducted a naturalistic observational study where they captured and analyzed the movements of vehicles at 11 two-way stop controlled intersections. This research modelled the time based upon acceleration distance, which is needed for a crash reconstruction (or collision avoidance system) to determine whether a crash is avoidable or not.

“The models were not only used in our reconstructions, but incorporated in commercial software as well,” said Sam Kodsi, co-author of the paper.

The paper was published by SAE; other professionals may purchase it at: http://papers.sae.org/2010-01-0062/

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