Estimating average travel times from bus travel times

This paper is to estimate the average travel times of roads from bus travel times and to examine the possibility of using buses as probe cars for collecting the average, travel times. Several estimation methods of average travel times from those of buses are examined and developed. From field data, those models are calibrated and the average travel times are estimated. Through a statistical comparison between the estimated travel times and the observed travel times of average cars, these estimation methods and the possibility of using buses for probe cars for collecting the average travel times are evaluated. It turned out that estimating average travel times from bus travel times is quite reliable and, therefore, using buses as probe cars for collecting average travel times can be practical.