01517608

Component

https://doi.org/10.3141/2439-06

http://scholar.google.com....+Ma&publication_year=2014

Most traffic accidents are related to driving behaviors. Dangerous driving behaviors may occur if a vehicle is trapped in the dilemma zone. Traditional methods for calculating the number of vehicles in the dilemma zone (NVDZ) are usually based on field data collection and postanalysis and require a great deal of time and human resources. This paper proposes an analytical model for estimating NVDZ on the basis of signal timing, arterial geometry, traffic demand, and driving characteristics. Through application of Robertson’s platoon dispersion model, the proposed model calculates the flow rate in the dilemma zone area at yellow onset as well as queue lengths under a discrete time horizon. A VISSIM-based microscopic simulation is then calibrated to validate the NVDZ calculation. The mathematical framework for signal optimization is implemented. Most of the current signal optimization methodologies do not consider safety measures such as NVDZ to be an objective. In this paper, delay and NVDZ are formulated as a multiobjective optimization problem addressing efficiency and safety together. Examples show that delay and NVDZ are competing objectives and cannot be optimized at the same time. Finally, an economic model is applied to quantify both delay and NVDZ in monetary values. The optimal solution considering both factors reduces NVDZ by more than 20% with a less than 2% increase in delay compared with minimizing only delay. The total cost is reduced.

01541069

14-1362

English

pp 62–70

2014

Transportation Research Record: Journal of the Transportation Research Board

9780309295260

Print

Figures (6) ; References (33) ; Tables (1)

Dilemma zone; Economic models; Highway safety; Methodology; Optimization; Queuing; Traffic signal control systems; Traffic signal timing

Data and Information Technology; Highways; Operations and Traffic Management; Safety and Human Factors; I71: Traffic Theory; I72: Traffic and Transport Planning; I73: Traffic Control

TRIS, TRB, ATRI

Jan 27 2014 2:31PM

• Coupled Linear Programming Approach for Decentralized Control of Urban Traffic
• Design Guidelines and Conditions That Warrant Deployment of Fully Actuated Coordination
• Graphical Performance Measures for Practitioners to Triage Split Failure Trouble Calls
• High-Resolution Event-Based Data at Diamond Interchanges: Performance Measures and Optimization of Ring Displacement
• Improving Intersection Behavior Through Delay-Based Left-Turn Phase Initiation
• Optimal Intersection Operation with Median U-Turn: Lane-Based Approach
• Sorting Model of Optimization Order in Traffic Signal Planning
• Use of Event-Based Traffic Data in Generating Time-Space Diagrams for Evaluation of Signal Coordination