80 drivers (aged <30, 40-59, 60-69, and 70+ years) participated in research to identify factors contributing to older driver's rural T-intersection accidents. Ss estimated safe gaps and speeds for traffic approaching from their right from a test vehicle parked at a right-angle to the highway. Safe gaps for a right turn onto the highway were estimated using threshold and single judgment procedures. A laser device recorded traffic speed and distance. Ss' speed at turning right across the road also was tested. Ss aged over 59 yrs had the most visual defects and the poorest neck articulation. All Ss judged speed poorly, overestimating slower and under-estimating faster traffic. Ss used distance rather than speed in gap estimation. Ss under 30 yrs allowed the smallest gaps, and Ss over 59 yrs were the least consistent judges and were slower to clear the next lane when turning right. Older drivers may be at higher risk at intersections. (Author/publisher)
Samenvatting