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- Title
Adequacy of TRANSYT-7F and Synchro models along a major arterial in Saudi Arabia.
- Authors
Ratrout, Nedal T.; Abu Olba, Maen Abdullatif
- Abstract
The TRANSYT-7F and Synchro models are used in developing optimal timing plans in the city of Al-Khobar, Saudi Arabia. This paper evaluates the adequacy of both TRANSYT-7F and Synchro under local traffic conditions by comparing queue lengths observed along a major arterial in the study area with simulated queues. The models were then calibrated to produce simulated queue lengths which are as close as possible to the observed ones. A clear difference was found between queue lengths estimated by Synchro and TRANSYT-7F. A queue length calibration process was accomplished for TRANSYT-7F by using platoon dispersion factor values of 20 and 35 for through and left-turning traffic, respectively. Synchro calibration was unsatisfactory. The simulated queue lengths could not be calibrated in a meaningful way to resemble the observed queue lengths. Regardless of this, both models produced comparable optimal signal timing plans.
- Subjects
SAUDI Arabia; SYNCHRO control transformers; PHYSICAL measurements; SYNCHRONIZATION; DISPERSION (Chemistry); CALIBRATION; TIME measurements
- Publication
Canadian Journal of Civil Engineering, 2009, Vol 36, Issue 1, p95
- ISSN
0315-1468
- Publication type
Article
- DOI
10.1139/L08-120