Signal Timing Optimization Methodologies and Challenges for the City of Baltimore, MD, USA, Central Business District and Gateways

摘要

At the conclusion of this project, it was clear to all involved parties that this effort could not have been possible to accomplish in a 12-month period without using a computerized tool for signal timing evaluation and optimization. The use of the traffic signal timing model to code this large network by multiple users, perform independent signal timing evaluation and subsequently merge the files to a single working file was invaluable. The associated microsimulation software also demonstrated its strength and effectiveness when developing and visualizing alternative offset and split solutions and corresponding progressions plans. The model calibration process was educational and enforced the fundamental concepts and principles of traffic flow theories. This project proved that with good understanding of signal timing concepts, the user could leverage the strength of signal timing models and engineering judgment. Finally, the benefits derived from this project proved that signal timing should not be compromised in the field, and an effort like this to perform city-wide signal timing optimization is well worth the money. The benefits outweighed the costs of the entire project in less than 3 months and exceeded the expectations of city and public officials.