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Citation |
Chaudhary NA, Messer CJ. Transp. Res. Rec. 1993; 1421: 82-93. |
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Copyright |
(Copyright © 1993, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing) |
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DOI |
unavailable |
PMID |
unavailable |
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Abstract |
The development of PASSER IV, a practical state-of-the-art program for simultaneously optimizing progression bandwidth in multiarterial traffic signal networks, is described. PASSER IV is efficient and is being developed for use on personal computers. A user-friendly mouse-driven graphic interface that provides data entry and file management functions makes the program extremely easy to use. However, the main core of the program, written in FORTRAN 77 using structured programming techniques, is usable on virtually any type of computer. The existing version of PASSER IV determines all four signal timing parameters: cycle length, green split, offset, and phasing sequence. The program optimizes cycle lengths, offsets, and phasing sequences to maximize progression bandwidth. The green splits, however, are determined in a preprocessor using Webster's method. In addition, PASSER IV is capable of minimizing cycle length and can report signal timings for several alternative optimal solutions. Also described is ongoing research to enhance the capabilities of PASSER IV. This research includes optimization of green splits, optimization of two additional main-cross split (circular) phasing sequences, delay calculation procedure, and the capability to generate data files for TRANSYT 7F to facilitate fine-tuning of bandwidth solutions through bandwidth-constrained delay optimization. The final version of PASSER IV will be available in mid-1994. Language: en |
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Keywords |
Traffic signals; Optimization; Highway traffic control; Computer software; User interfaces; Interactive computer graphics; FORTRAN (programming language); File organization; Personal computers; Structured programming |