| Summary |
Cheng-Yen Wu,2007.06
Department of Transportation Technology and Management National Chiao Tung University
When traffic flow approach to the certain amount at the intersection, in order to make the traffic more efficiently, we can control the traffic flow discharge by signal. If the signal is not well designed, the delay time will be increased instead. Many studies indicate that the amount of vehicle discharged is affected by discharging behavior during green phase. So, to understand discharging behavior could be referenced for estimation of road capacity and traffic signal design. Many studies about discharging behavior at the intersection are in the method of macroscope or mesoscope. Few studies directly analyzed the vehicles types and turning discharging characteristics and considered the queuing vehicles opposable position to analyze ordered vehicles queuing discharging behavior. It’s worth studying.
Ordered vehicles mean the sequence of vehicles stop before the stop line. This study aims at the characteristics of the unopposed left turns under exclusive signal. And we also compared and discussed the queuing discharging behaviors in cases of single left turn lane and two left turn lanes. We analyze the discharging characteristics of unstable and approximate stable discharging traffic flow in signalized intersection, and discuss the difference of the combination of two types of vehicle and gap interval.
Then we construct the Microscopic Discharging Model of Ordered Vehicles. Besides this, we find some characteristics at the intersection. Before the protected left-turn phase begins, the first left-turn vehicle often enters the intersection results of parts of left-turn vehicles following it. We will discuss the characteristics of this behavior. The results of this study could be referenced for microscope traffic flow dynamic simulation model, estimating the capacity of lanes, designing signal and etc. |
