Article ID: | iaor2004315 |
Country: | United Kingdom |
Volume: | 10C |
Issue: | 4 |
Start Page Number: | 257 |
End Page Number: | 273 |
Publication Date: | Aug 2002 |
Journal: | Transportation Research. Part C, Emerging Technologies |
Authors: | Fu Liping, Hellinga Bruce R. |
Keywords: | simulation |
The use of probe vehicles to provide estimates of link travel times has been suggested as a means of obtaining travel times within signalized networks for use in advanced traveler information systems. Previous research has shown that bias in arrival time distributions of probe vehicles will lead to a systematic bias in the sample estimate of the mean. This paper proposes a methodology for reducing the effect of this bias. The method, based on stratified sampling techniques, requires that vehicle count data be obtained from an in-road loop detector or other traffic surveillance method. The effectiveness of the methodology is illustated using simulation results for a single intersection approach and for an arterial corridor. The results for the single intersection approach indicate a correlation