01049650

Component

https://doi.org/10.3141/2035-18

http://scholar.google.com...lura&publication_year=2007

Enabling vehicles to preempt the normal operation of traffic signals has the potential to improve the safety and efficiency of both the requesting vehicle and all other vehicles. Little is known about which strategy is the most effective to exit from preemption control and transition back to the normal traffic signal timing plan. This research evaluates the commonly available transition strategies: best-way, long, short, and hold strategies. The major contribution of this research is to enhance the methodology to evaluate the impacts of using these alternative transition strategies with the software-in-the-loop simulation tool. The research concludes that a statistically significant interaction exists between traffic volume levels and traffic signal transition strategies; this eliminates the ability to determine the isolated effects of either the transition strategies on average travel delay and average travel time or the effects of changes in traffic volume levels on average travel delay and average travel time. Conclusions, however, could be drawn on the performance of different transition strategies for specific traffic volume levels. The research also concludes that for the base traffic volume and a 40% increase in traffic volume, the most effective transition strategies are the best-way and long or hold alternatives. The best way was the most effective transition strategy for a 20% increase in traffic volume. The least effective strategy is the short transition strategy for both the base and 40% increase in traffic volume and the long and short for a 20% increase in traffic volume. Further research needs to be conducted to assess the performance of different transition strategies in returning to coordinated operation under higher levels of traffic volume with varying cycle lengths and different signal timing plans and when different roadway geometric configurations are present.

01091263

English

pp 158-168

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104623

Print

Figures (3) ; References (10) ; Tables (6)

Traffic delays; Traffic signal control systems; Traffic signal preemption; Traffic signal timing; Traffic volume; Travel time

Software in the loop simulation; Traffic signal transition strategies

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Feb 8 2007 7:23PM

• Active Signal Priority for Light Rail Transit at Grade Crossings
• Advance Preempt with Gate-Down Confirmation: Solution for Preempt Trap
• Application of Diamond Interchange Control Strategies at Closely Spaced Intersections
• Data-Driven Algorithms for Real-Time Adaptive Tuning of Offsets in Coordinated Traffic Signal Systems
• Effectiveness of Alternative Detector Configurations for Option Zone Protection on High-Speed Approaches to Traffic Signals
• Empirical Observations of Dynamic Dilemma Zones at Signalized Intersections
• Evaluating Effects of Toll Strategies on Route Diversion and Travel Times for Origin–Destination Pairs in a Regional Transportation Network
• Evaluation of Adaptive Maximum Feature in Actuated Traffic Controller: Hardware-in-the-Loop Simulation
• Event-Based Data Collection for Generating Actuated Controller Performance Measures
• Feasibility of Traffic Simulation for Decision Support in Real-Time Regional Traffic Management
• Foundation for Jointly Determining Passage Time and Detection Zone Length with Stop Bar Presence Detection
• Implementation of Lane-by-Lane Detection at Actuated Controlled Intersections
• Input–Output and Hybrid Techniques for Real-Time Prediction of Delay and Maximum Queue Length at Signalized Intersections
• Modeling Traffic Signal Operations with Precedence Graphs
• Models for Quantitative Assessment of Video Detection System Impacts on Signalized Intersection Operations
• Opening the New Woodrow Wilson Memorial Bridge: Planning and Implementing a Major Traffic Switch
• Performance Analysis of Coordinated Traffic Signals During Transition
• Recasting Dilemma Zone Design as a Marginal Cost-Benefit Problem
• Risk Analysis to Account for Uncertainty in Benefit–Cost Evaluations of Intelligent Transportation Systems
• Short or Long—Which Is Better? Probabilistic Approach to Cycle Length Optimization
• Traffic Operations for Hurricane Evacuation
• VisSim-Based Genetic Algorithm Optimization of Signal Timings