Intersection crossing assist system: Transition from a road-side to an in-vehicle system

Due to high vehicle velocities rural intersections have a disproportionately high rate of fatalities. The current study examines the transition from an infrastructure-based rural intersection crossing assist system to one located inside a vehicle. Moreover, we investigate the efficacy of the in-vehicle system. Three different designs of the assist system were examined regarding their impact on driving performance and applicability to varying age groups and visibility conditions. These designs differed in terms of their complexity based on the amount of information that drivers received about the intersection traffic. Seventy-two older and younger participants divided into the three design groups crossed a busy rural intersection in a simulated environment. Drivers completed four blocks of trials in which the presence of the assist system and visibility conditions (limited, clear) were counterbalanced. When presented with the assist system drivers were less likely to accept a smaller gap, especially under low-visibility conditions. The design of the assist system that resulted in the best overall intersection crossing performance was also the most informative about the traffic. Older drivers exhibited some benefits from the presence of the assist system, although not to the same extent as the younger drivers. The results suggest that some infrastructure-based assist or information display systems could successfully be transitioned to inside a vehicle.

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