PFI Geometric Signal Phase Control Model Based on Shock Wave Theory
Aiming at the new unconventional intersection parallel flow intersection(PFI)in China,the problems of insufficient research,imperfect specification and limited application,the intersection geometric signal phase control model is established to study the geometric layout and signal coordination of PFI.Based on the theory of traffic flow shock wave,the queuing of stop lines at each location in PFI is analyzed,and the geometric signal phase control model of PFI is established.By setting a series of constraints,a model parameter solution method is proposed to satisfy the queuing without overflow under the minimum cycle condition.Meanwhile,based on the traffic simulation simulation,the VISSIM simulation model of traditional level crossing and improved PFI scheme is constructed and calibrated with the measured traffic data.The results show that:1)The PFI scheme outperforms the traditional level intersection in terms of access efficiency,safety and traffic sustainability,which is manifested in the effective enhancement of intersection capacity,the reduction of average delay time and queue length,the reduction of the number of conflicts,as well as the reduction of vehicle fuel consumption and CO emissions,which verifies the validity of the geometric signal phase control model of PFI;2)The PFI geometric signal phase control model based on shock wave theory and its supporting design method proposed in this paper can provide reference for the design and construction of unconventional intersections.
万方数据
维普
