Research on Unblocked Reliability of Road Network under Different Traffic Demand and Supply Distribution

Abstract

Unblocked reliability is a probability index, which reflects the relationship between traffic demand and supply in peak hour at workday. Regarded traffic demand and road capacity as variables conforming normal distribution, the different road network unblocked reliability can be gotten by the random experimentation, and the change rules of road network unblocked reliability and velocity under different supply and demand combination were put foreword. The road network unblocked reliability analyses show that, the change rules of road components, routes, OD, and network are alike; the unblocked criterion is higher, the unblocked reliability is smaller; the traffic demand is lower, the corresponding reliability is higher under the same unblocked criterion and the same demand variation.