Institute of Transportation, MOTC

Chin-Hsing Chen, 2008.06
Graduate Institute of Transportation Science, Tamkang University

　　In the past, some studies found that the travel time of signalized road could be solved by summing up link travel times and delay times of related intersections. The rationality of this concept has not been proved.

　　In this paper, we defined the Expectation of Intersection Influenced Length for demarcated two different states of traffic flow on signalized road. The travel time estimation model comprised “link part” and “intersection part”. The flow rate has been treated as an independent variable in regression analysis.

　　The empirical study is shown that the value of MAPE of the established model is lower than 20% when the downstream signal G/C is greater than 0.7. But the value of MAPE is somewhat higher than Oh + Webster model when the downstream signal G/C is lower than 0.7. The research only applies flow rate and speed data from vehicle detectors. Compare with Oh + Webster model, the merits of this model are simple computation and less data collection.