Traffic headways in saturated conditions are an important aspect of traffic engineering. Intersection's capacity and passenger car equivalency factors are derived from analyzing those saturated headways as queues are discharged. However, limited studies investigated the effect of the type of preceding vehicle on headways. This study aims to compare the headways of two main vehicle classes, passenger cars, and heavy trucks, and to examine if the preceding vehicle class has an impact on those headways. Saturated headway data were collected from a signalized intersection that experiences significant heavy truck demand. Statistical tests with a 95% confidence level are considered for the headways' comparison. As expected, the results show that their average headway for passenger cars is different from the heavy trucks. Contrary to the expected, and for the same vehicle type, the results show no statistical difference between headway, regardless of the type of the preceding vehicle.
Comparison of Saturated Headways in Mixed Traffic Conditions at Signalized Intersection
2023-05-12
819389 byte
Conference paper
Electronic Resource
English
Average vehicle headways at signalized intersections
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