การวิเคราะห์ประสิทธิภาพการดำเนินงานของด่านชั่งน้ำหนักรถบรรทุกด้วยเทคโนโลยีชั่งน้ำหนักขณะเคลื่อนที่โดยใช้แบบจำลองการจราจรระดับจุลภาค

Abstract

Thailand has continued economic growth particularly in the industrial and service sectors. It results in the increased number of trucks on road networks. The increased number of trucks has a direct impact on road traffic and roadway conditions. In addition, the transportation business is more competitive, and causing the truck load to exceed the legal limit. With this reason, road authorities have established truck stations along road network to monitor truck weighing operations. However, in the past the truck weigh stations and systems had limitation in operations and quality of service. They possibly create traffic congestion and service delays at the weighing checkpoint. Currently, the Weigh-In-Motion (WIM) technology has been adopted, a technology that can weigh vehicles in motion through a weighing device and can screen overloaded trucks to reduce the number of trucks being weighed at the static truck weigh stations. The objective of this study was to analyze the operational performance among three types of truck weigh stations including Static weighing, Static weighing with Weigh-In-Motion technology, and Spot Check weighing stations on 2-lane and 4-lane roads. The study develops microscopic traffic simulation models to evaluate the operational performances and compare the level of service among truck weigh stations. The analysis help recommend the suitable truck weigh stations under different traffic conditions and road environments. Moreover, the study applies microscopic traffic simulation models to the real-world truck weigh station on CM 3035 road in Chiang Mai Province. The study is used to analyze operational efficiency and benefits by estimating truck delays, travel time, queue lengths and level of service. The results of the operational analysis among three typical types of truck weigh stations. showed that the Weigh-In-Motion technology could reduce truck delays, the average travel time, and the average truck queue length and waiting time. Since Weigh-In-Motion technology can help screen for the overloaded trucks. the number of trucks being weighed at the weighing stations was reduced. Therefore, static truck weigh stations with Weigh-In-Motion (WIM) technology lead to lessen traffic problems. Furthermore, the real-world application to truck weigh station on Chiang Mai Rural Road 3035 showed the comparison between equipped and non-equipped Weigh-In-Motion technology. The analysis during peak hour and off-peak hours revealed that Weigh-In-Motion technology reduced truck delays by 83.7% and 91.4%, respectively. It reduced the average travel time by 4.8% and 3.7% respectively. It reduced the average truck waiting length (queue length) by 92.8% and 93.4%, respectively. The study also performed the sensitivity analysis. The comparison found that with the increased service time and increased hourly traffic, the Weigh-In-Motion technology system can improve traffic conditions. For example, it can reduce queue lengths by 82.3%, 92.8% and 97.8% for the service times of 15, 30 and 60 seconds, respectively. The economic analysis of the CM-3035 truck weigh station with Weigh- In- Motion technology revealed the travel time saving and fuel consumption. The analysis found that the WIM technology can result in travel time savings of 9,77 baht year and fuel consumption saving of 97,7 baht/year.