Microscopic Estimation of Road Impedance by Decomposing Traffic Delay into Individual Road Segments: An Analytical Approach

Abstract

Urban road dynamic impedance calculation is the important basis of dynamic traffic assignment and real-time traffic management and control scheme. The current impedance calculation is mostly based on BPR function, and the BPR function is derived from macroscopic statistical laws, in which the microscopic characteristics of traffic flow are insufficiently described. In order to more accurately express the change laws of traffic impedance at the microscopic level, a stochastic dynamic traffic assignment algorithm based on road impedance function is designed to analyze the time impedance of congested roads under random dynamic traffic assignment under different conditions of road network saturation. Compared with the current model, the comprehensiveness and portability are greatly improved. The results show that the impedance calculation error of this method is less than 10% when the load degree of the road is lower than 0.85, which proves that the method has good precision under unsaturated flow conditions.

Controlling Traffic Congestion in a Residential Area via GLOSA Development

“…FDM's study highlights that traffic delays caused by roadwork, uncoordinated traffic lights, and improper traffic rerouting are common causes of congestion [19]. To address these issues, traffic management apps need to consider the capacity and characteristics of the road network when suggesting routes to users [20,21].…”

“…Sci. 2024, 14, x FOR PEER REVIEW 4 of 13 consider the capacity and characteristics of the road network when suggesting routes to users [20,21].…”

“…Analyzing traffic flow is an important task for ensuring the efficiency of the road network. A crucial element in analyzing traffic flow is the road capacity, defined as the highest number of vehicles that can traverse a specific road section within a specified timeframe [21].…”