01477010

Component

https://doi.org/10.3141/2355-10

http://scholar.google.com...+Luo&publication_year=2013

Many congested intersections have heavy traffic volume on movements for which there is insufficient capacity because of geometric limitations. Installing presignals at midblock locations and reorganizing traffic upstream of the approach of an intersection combine to be a promising and cost-effective method for addressing these capacity limitations. A coordinated optimization model was developed for an isolated intersection approach with presignals to increase the protected left-turn phase capacity. The presignal model was based on two principles: (a) explicitly capture the interaction between the presignal and the main signal by modeling the queuing process and capacity constraints of temporal and spatial limitations of the intersection and (b) optimize the signal timings of both the presignal and the main signal as well as the offset between them to produce the best operational strategy for the approach. The minimum green time required and the delay-minimization problems are considered. Extensive experimental analysis has shown that the presignal model outperforms the conventional control method (without presignal). Sensitivity analysis of the signal timing method that will assist traffic engineers with selecting the appropriate length of the sorting area, phase sequence, and early starting time of presignals was conducted. The results from the study offer a basis for traffic practitioners, researchers, and authorities on which to design and utilize presignals in locations where there is a need to increase intersection capacity for congested movements.

01495450

13-3033

English

pp 93–104

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309286725

Print

Figures (7) ; References (20) ; Tables (2)

Left turn phase; Midblock crossings; Optimization; Queuing; Sensitivity analysis; Signalized intersections; Traffic signal timing; Traffic volume

Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Safety and Human Factors; I73: Traffic Control

TRIS, TRB, ATRI

Feb 5 2013 12:37PM

• Development and Use of Critical Functional Requirements for Controller Upgrade Decisions
• Increasing the Capacity of Signalized Intersections with Dynamic Use of Exit Lanes for Left-Turn Traffic
• Longitudinal Performance Measures for Assessing Agencywide Signal Management Objectives
• Optimized Advance Detector Configuration for Option Zone Protection at High-Speed Signalized Intersections
• Probability Model for Understanding the Effects of Detector Delays on Right-Turn-on-Red Traffic
• Revisiting the Cycle Length: Lost Time Question with Critical Lane Analysis
• Simple Methodology for Estimating Queue Lengths at Signalized Intersections Using Detector Data
• Traffic Signal Timing Optimization: Choosing the Objective Function
• Two-Step Optimization Model for Dynamic Lane Assignment at Isolated Signalized Intersections