THE STUDY OF MAXIMUM SERVICE RATE OF TRUCK TOLL BOOTH AT BOTH OPENED AND CLOSED SYSTEM

Abstract

One of the traffic congestion in front of the tollgate is that the traffic demand is higher than the tollgate capacity. In particular, long queues occur in front of the truck toll booth during the truck peak hour. The objective of this study is to determine the maximum service rate of truck toll booth on open and closed toll system. The data were collected from Toll plazas of Department of Highway (DOH) and The Expressway Authority of Thailand (EXAT). The study found that maximum service rates of truck toll booth between open and closed toll system were different, significantly, and they also depended on the both type of trucks and their compositions. The different types of truck were categorised into: 6 wheels, 10 wheels, more than 10 wheels (Semi Trailer and Trailer). Based on types of truck as described, the maximum service rates on open toll system are 365, 310, 255 and 240 veh/hr, respectively, and the maximum service rates on closed toll system are 240, 205, 180, 165 veh/hr, respectively. It is obvious that open toll system could perform the service rate better than the closed toll system.