Relationship between Indices of Traffic Flow Characteristic and Its Application to the Evaluation of Traffic Performance

Abstract

For evaluating the level of traffic service, we proposed a measure of effectiveness index named “Inter-Base Accessibility Index” which evaluates how easy to access to a base. This index consists of terms of driving safety and smoothness, and the value well fit the driver’s subjective evaluation. However, the evaluation process is rather complicated so that it is not easy for road administrators. To resolve the difficulty mentioned above, this study proposes an easy to handle method to estimate the value of index by using traffic counter data By analyzing relationships between the values of parameters that define the distribution of the value of Inter-Base Accessibility Index and relating traffic characteristics, a new method has been developed which makes us simple and easier estimation possible. Through a numerical case study based on the traffic data generated by microscopic traffic simulation, the estimated distributions of the index by using proposed method shows fairly good fitness to the observed distributions.