主催: Eastern Asia Society for Transportation Studies
p. 22
For roadway users, the tunnel sections are the potential bottlenecks of highways. In Taiwan, the NH-5 highway with three tunnels was opened to traffic in June 2006. Based on the detector data, this study examined the spatial and temporal variations of capacity, free-flow speed, and speed-flow relationship. And, the two-lane capacities of Shi-Ting, Pern-San and Shea-San tunnels are of approximately 3,850, 3,300 and 2,950 pcph near the southbound exit and 3,200, 3,200 and 2,500 pcph at the northbound exit. These capacities are low by freeway standards, and it also reveals the capacity becomes lower while the tunnel is longer.
