Analysis of Freeway Traffic Speed by Power Spectral Density Methods

摘要

This report presents results of a study using a Maximum Entropy Spectral Analysis(MESA) approach to evaluate driver behavior as related to driving speed taking into consideration heavy and light traffic conditions, rainy and dry weather conditions, impacts of traffic entering from ramps, ramp impacts, and operating characteristics of various drivers. Three test sites were chosen in the Albany area. Testing vehicle speed between two fixed points was recorded and transferred to spectral density functions. Impacts of traffic conditions, weather conditions, vehicles entering from ramps, and driver behavior can be identified from these spectral density characteristics. Basic concepts of maximum entropy spectral analysis and results of the field experiments are discussed and presented in the Appendix.