การวิเคราะห์รูปแบบจุดเปิดเกาะกลางบนทางหลวงแผ่นดินโดยใช้แบบจำลองการจราจรระดับจุลภาค

Abstract

A median opening with restricted U-Turn vehicles (or a median U-turn separating between motorcycles and cars) is a new median opening design that has been paid attention and gradually applied on the main road to address traffic and safety problems. The objective of this paper was to analyze the performance of the median openings with restricted U-Turn vehicles compare with future models and comparing the operational efficiency of the various patterns of median openings including (1) median opening without storage U-turn lane; (2) median opening with storage U-turn lane; (3) median opening with separate motorcycle U- turn opening; (4) median opening with separate motorcycle U-turn opening and signal control; (5) median opening with Over Pass and (6) median opening with U-turn Bridge. This paper applied the microscopic traffic simulation model to analyze the performance in terms of queue length, delay, volume cars of thru and level of service to the median opening with restricted U-Turn vehicles on the National Highway Number 101 at km 364+356 in Nan Province. The simulation results presented the performance of individual median opening and the traffic condition for which median opening is suitable. The simulation can be used as a tool to recommend highway engineers the suitable type of median opening in different current and future circumstances.