01049292

Component

https://doi.org/10.3141/2035-15

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

Several actuated traffic controllers contain the adaptive maximum feature, with which controllers can adjust the maximum green intervals for actuated phases within specified upper and lower limits according to fluctuating traffic demand. It has been difficult, however, to evaluate the merits of this and other features available in modern traffic controllers. Recent developments in traffic signal control system hardware and software technologies have now made it possible to evaluate controller features in a realistic and risk-free environment with hardware-in-the-loop simulation (HILS). HILS is a method of simulation in which one or more actual traffic signal controllers are physically linked with a microscopic traffic simulator. The performance of the adaptive maximum feature is demonstrated with HILS, which consists of an EPAC300 traffic controller and the VisSim microscopic simulation model. The demonstration was conducted at an isolated, fully actuated intersection in Richmond, Virginia. In a feasibility test, the HILS results indicated that the adaptive maximum feature was able to provide traffic signal control operations as efficiently as normal maximum green intervals optimized by Synchro. However, in a robustness test, where 15% changes in traffic volumes were considered, the adaptive maximum feature outperformed the normal settings for maximum green intervals.

01091263

English

pp 134-140

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104623

Print

Figures (3) ; Photos (2) ; References (19) ; Tables (8)

Actuated traffic signal controllers; Adaptive control; Green interval (Traffic signal cycle); Hardware in the loop simulation; Traffic simulation; Traffic volume

VISSIM (Computer model)

Richmond (Virginia)

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Feb 8 2007 6:36PM

• 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
• 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
• Methodology to Assess Traffic Signal Transition Strategies for Exit Preemption Control
• 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