01019562

Component

https://doi.org/10.3141/1925-17

http://scholar.google.com...hang&publication_year=2005

A signal control system named Real-Time/Internal Metering Policy to Optimize Signal Timing (RT/IMPOST) has been under development for several years. It is designed to compute signal timing plans for the entire range of operating conditions from under- to oversaturation for control systems ranging from first generation (GEN 1) to highly responsive advanced traffic management systems. The different flow regimes of urban traffic control are reviewed. Then the focus is on the treatment to develop cycle-based signal timing plans for inclusion in the data libraries referenced by GEN 1 real-time traffic control systems for the undersaturated-flow regime. This approach decomposes a grid network into its constituent arterial subsystems in a way that is responsive to user-specified priorities. The user may define and rank the arterial systems subsumed within a grid network so as to satisfy strategic objectives responsive to traffic demand patterns and local needs. The procedure computes optimal signal timing plans for all these arterial subsystems in a priority-ranked sequence and integrates these arterial-based timing plans to form a networkwide signal timing plan. Field and simulation test results are presented. The field tests confirm that the IMPOST timing plans improved the operational performance of traffic along an arterial system in New York State relative to a fine-tuned existing control. The simulation studies compared the performance of traffic responding to IMPOST signal timing plans with that responding to Synchro 6.0 signal timing plans. The benefits of network decomposition and of arterial priority ranking are also documented.

01019553

English

pp 167-175

2005

Transportation Research Record: Journal of the Transportation Research Board

0309093996

Print

Figures (6) ; References (11) ; Tables (4)

Arterial highways; Field tests; Highway operations; Optimization; Performance; Real time control; Traffic signal control systems; Traffic signal timing; Traffic simulation

Network decomposition; Undersaturated conditions (Traffic)

New York (State)

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Feb 28 2006 8:14PM

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• Improved Framework and Systematic Calibration for Left-Turn Signal Change Intervals
• Improved Transit Signal Priority System for Networks with Nearside Bus Stops
• Integration of Diamond Interchange and Ramp Metering Operations
• Investigation of the Development and Use of a Concept of Operations in Traffic Management Systems
• Metering Ramps to Divert Traffic Around Bottlenecks: Some Elementary Theory
• Methodology for Performance Optimization of Ramp Control Strategies Through Microsimulation
• Optimal Control of Freeway Networks with Bottlenecks and Static Demand
• Performance of Advance Warning for End of Green System for High-Speed Signalized Intersections
• Performance of Transit Signal Priority with Queue Jumper Lanes
• Probe-Based Traffic Monitoring Systems with Wireless Location Technology: An Investigation of the Relationship Between System Design and Effectiveness
• Reconsidering Freeway Bottlenecks: Case Studies of Bottleneck Removal Projects in Texas
• Regional Concept for Transportation Operations: A Tool for Strengthening and Guiding Collaboration and Coordination
• Resonant Cycles in Traffic Signal Control
• Use of Performance Measurement System Data to Diagnose Freeway Bottleneck Locations Empirically in Orange County, California
• Using Hardware-in-the-Loop Simulation to Evaluate Signal Control Strategies for Transit Signal Priority