Production of Vehicle Actuated Traffic Signal Controller for Road Work and Results of Field-Testing

Abstract

Production of Vehicle Actuated Traffic Signal Controller for Road Work and Results of Field-Testing In a road construction site where pedestrians and vehicles have to use either of the inbound or the outbound lane each other on the spot, traffic control is made in accordance with flagman's instructions or indications transmitted from the fixed-time signals on the site. As to the control provided by such traffic guides, serious problems are often pointed out with the danger of collision with cars and vehicles to which the flagmans are always exposed. As to the control by means of traffic signals on the spot, seriousness is likewise brought about with the production of undesired waiting time or traffic congestion owing to the fixed-time signal control. Keeping such a situation in mind, a controller with which signal control complying with traffic demand is possible has been built up as a prototype in order to allow the burden imposed upon the flagmans to be alleviated or the safety of such injury-prone guides to be secured together with the purpose of accomplishing smoother traffic control. With the aid of the prototype, experiments on the site were conducted accompanied with the analysis taking up principally the lowering effect of the delay time. As a result, it is confirmed that the vehicle-actuated traffic signal controller developed for road work has sufficient utility and abundant usefulness.