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Title: Modeling Signalized Intersections near Highway–Railroad Grade Crossings:
Sensitivity Analyses of Key Design Parameters
Accession Number: 01024569
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Many roadway intersections throughout North America are located near highway–railroad grade crossings (IHRGCs). Numerous safety, operational, and legal challenges are associated with IHRGCs; and these become significantly more complex when traffic signals are present. Because of the complexity of traffic operations at IHRGCs, existing macroscopic analysis approaches are not suitable for in-depth analyses. Consequently, a more detailed methodology for the analysis of intersections with traffic signals located near IHRGCs was developed. The approach is microsimulation based and relies on hardware-in-the-loop architecture to model the traffic signal controller. To demonstrate the methodology, sensitivity analyses of key design parameters were undertaken, and their impacts on safety and delay were analyzed. Specifically, (a) the maximum train speed and the corresponding length of the detector, (b) the effect of the pedestrian volume, and (c) the effect of the addition of an additional upstream train detector were examined in terms of safety and delay at the IHRGC. The methodology was tested with empirical data from a test bed in College Station, Texas. It was found that the manner in which the maximum train speed was calculated could have a statistically significant effect on delay and a detrimental effect on safety. It was also shown that the addition of an additional upstream detector could reduce delay and increase safety.
Monograph Accession #: 01037994
Language: English
Authors: Cho, HanseonRilett, Laurence RussellPagination: pp 149-156
Publication Date: 2006
ISBN: 030909982X
Media Type: Print
Features: Figures
(4)
; References
(12)
; Tables
(2)
TRT Terms: Uncontrolled Terms: Geographic Terms: Subject Areas: Highways; Operations and Traffic Management; Railroads; I73: Traffic Control
Files: TRIS, TRB
Created Date: Mar 3 2006 10:53AM
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