This study presents the effects of a warning signal (countdown signal) on the total start-up lost time of automobiles at signalized intersections based on the data collected at thirty signalized intersections in Bangkok, Thailand. This signal is used to warn motorists in queue at the stop line during any red phase on when each phase will start and end. The data indicates that the warning signal does not have any effect on the saturation headway of automobiles, but on the total start-up lost time. With the use of the warning signal, the total start-up lost time was decreased from 4.3 seconds to 2.9 seconds, or was reduced by thirty three percent. Therefore, the warning signals may be used to increase the capacity of signalized intersections. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E213531.
Samenvatting