Due to sun glare disturbances, drivers encounter fatal threats on roadways, particularly at signalized intersections. Many studies have attempted to develop applicable solutions, such as avoiding sun positions, applyi...Due to sun glare disturbances, drivers encounter fatal threats on roadways, particularly at signalized intersections. Many studies have attempted to develop applicable solutions, such as avoiding sun positions, applying road geometric re-directions, and wearing anti- glare glasses. None of these strategies have fully solved the problem. As one of the ＂Con- nected Vehicle＂ practices proposed by the U.S. Department of Transportation, advanced warning messages （AWMs） are capable of providing wireless information about traffic controls. AWM acts as a supplement to conventional signs and signals, which can be blocked by obstacles or natural disturbances, such as sun glare. The drivers＇ smart advisory system （DSAS） can provide drivers with AWM. Using a driving simulator this research explores the effects of DSAS messages on driving behaviors under sun glare disturbance. Statistical analyses were applied to assess （1） the negative impacts of sun glare, （2） the compensation of the DSAS AWM to sun glare effects, and （3） the improvement in driving performance due to DSAS AWM. Four performance indexes were measured, including （1） half kinetic energy speed, （2） mean approach speed, （3） brake response time, and （4） braking distance. The effects of the socio-demographic factors, such as gender, age, educational background, and driving experience were also studied. The analytical results illustrate that the DSAS can compensate for reduced visibility due to sun glare and improve driving performance to a normal visual situation, particularly for left turn and through movement.展开更多
基金supported,in part,by the United States Tier 1 University Transportation Center TranLIVE #DTRT12GUTC17/KLK900-SB-003the National Science Foundation(NSF)under grants #1137732
文摘Due to sun glare disturbances, drivers encounter fatal threats on roadways, particularly at signalized intersections. Many studies have attempted to develop applicable solutions, such as avoiding sun positions, applying road geometric re-directions, and wearing anti- glare glasses. None of these strategies have fully solved the problem. As one of the ＂Con- nected Vehicle＂ practices proposed by the U.S. Department of Transportation, advanced warning messages （AWMs） are capable of providing wireless information about traffic controls. AWM acts as a supplement to conventional signs and signals, which can be blocked by obstacles or natural disturbances, such as sun glare. The drivers＇ smart advisory system （DSAS） can provide drivers with AWM. Using a driving simulator this research explores the effects of DSAS messages on driving behaviors under sun glare disturbance. Statistical analyses were applied to assess （1） the negative impacts of sun glare, （2） the compensation of the DSAS AWM to sun glare effects, and （3） the improvement in driving performance due to DSAS AWM. Four performance indexes were measured, including （1） half kinetic energy speed, （2） mean approach speed, （3） brake response time, and （4） braking distance. The effects of the socio-demographic factors, such as gender, age, educational background, and driving experience were also studied. The analytical results illustrate that the DSAS can compensate for reduced visibility due to sun glare and improve driving performance to a normal visual situation, particularly for left turn and through movement.
