A PASSER II-90 Postprocessor for Detailed Analysis of Arterial Traffic Control Parameters

by Cheng-Tin Gan, Univ of Florida, Gainesville, United States,
Kenneth G. Courage, Univ of Florida, Gainesville, United States,



Document Type: Proceeding Paper

Part of: Microcomputers in Transportation

Abstract:

Many preprocessors have been developed for traffic signal operation software to ease the tedious data input process or to perform error trapping on the input data. However, work to date on the development of postprocessors to assist in the analysis and presentation of results has been very limited. This paper describes a computer program called PASSER II-90 Analysis Package (PAP) which functions as a postprocessor to PASSER II-90. Some examples are given to show how this program may be applied to help analyze, therefore design, traffic control parameters. PAP iterates PASSER II-90 in a batch mode over a user-specified range for four controllable traffic control parameters; arterial phase sequence, cycle length, minimum 'A' direction band split, and minimum green times. The Measures of Effectiveness (MOE's) are extracted from each PASSER II-90 execution and stored in a database file containing the input parameter values used for iteration. Users can select any two parameters from a database to plot two-dimensional graphs or to perform linear regression modeling. The capability to analyze arterial phase sequences is emphasized. Multi-line and multi-scatter plots are predefined for plotting MOE's corresponding to existing and alternate/optimal phase sequences. In addition, a percentage chart can be created to exam the sensitivity or robustness of an intersection with respect to the phase sequence.

Subject Headings: Traffic signals | Traffic analysis | Computer analysis | Computer models | Computer aided design | Parameters (statistics) | Data analysis

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