01334211

Component

https://doi.org/10.3141/2259-24

http://scholar.google.com...nett&publication_year=2011

A series of innovations has been made in the vehicle sensors field. Technologies such as IntelliDrive and radar-based smart sensors make it possible to track each vehicle in proximity to an intersection. However, current technologies have limitations, such as lack of robustness, accuracy, or level of penetration. This paper assumes an accurate wide-area detector (WAD), which might be soon available, and highlights the potential benefits that might be derived in safety and efficiency of operations at high-speed intersections from the deployment of the WAD. Two critical areas in which wide-area detection can lead to significant improvements are discussed: (a) location of crash risk on onset of yellow and (b) location of vehicles on onset of yellow. A case study was conducted at an instrumented intersection in Noblesville, Indiana, to estimate potential improvement from the use of an ideally operating WAD and green extension logic for signal control. Findings revealed that the replacement of the single loop detector sensor with a WAD sensor would lead to an additional 1.4 vehicles being served per lane on the cross street per unit vehicle provided with dilemma zone protection on the high-speed approach. Results also showed that speed traps should be used only after accounting for the trade-off between safety and efficiency and the traffic control logic. When speed traps were designed with generic dilemma zone boundaries at the Noblesville site, the dilemma zone protection was provided only 57% of the time because vehicles accelerated or decelerated after passing the speed trap.

01364838

11-4089

English

pp 253-263

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309222952

Print

Figures (7) ; References (22) ; Tables (4)

Dilemma zone; Highway operations; Sensors; Signalized intersections; Technological innovations; Traffic safety; Video imaging detectors

High speed intersections; Speed traps

Noblesville (Indiana)

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB

Feb 17 2011 6:45PM

• Analysis of Peer Data on Intersections for Decisions About Coordination of Arterial Traffic Signal
• Automated Intersection Control: Performance of Future Innovation Versus Current Traffic Signal Control
• Comparison of Alternative Real-Time Performance Measures for Measuring Signal Phase Utilization and Identifying Oversaturation
• Computational Efficiency of Alternative Algorithms for Arterial Offset Optimization
• Design of Intergreen Times Based on Safety Reliability
• Detection of Stop Bar Traffic Flow State
• Detection Performance of Wireless Magnetometers at Signalized Intersection and Railroad Grade Crossing Under Various Weather Conditions
• Development and Evaluation of Optimal Arterial Control Strategies for Oversaturated Conditions
• Estimating Signalized Intersection Delays to Transit Vehicles: Using Archived Data from Automatic Vehicle Location and Passenger Counting Systems
• Evaluating Robustness of Signal Timings for Varying Traffic Flows
• Heuristic Algorithm for Priority Traffic Signal Control
• Heuristic Approach for Estimating Arterial Signal Phases and Progression Quality from Vehicle Arrival Data
• Integrated Control of Freeway Interchange Model Based on Enhanced Cell Transmission Model
• Intelligent Traffic Signal System for Isolated Intersections: Dynamic Pedestrian Accommodation
• Modeling Variability of Urban Travel Times by Analyzing Delay Distribution for Multiple Signalized Intersections
• New Evidence of Improvements in Dilemma Zone Protection by Detection-Control System
• Predictive Priority for Light Rail Transit: University Light Rail Line in Salt Lake County, Utah
• Quantifying Dynamic Factors Contributing to Dilemma Zone at High-Speed Signalized Intersections
• Quantifying the Benefit of Retiming Traffic Signals Through Multiple Regression
• Reliability, Flexibility, and Environmental Impact of Alternative Objective Functions for Arterial Offset Optimization
• Traffic Signal Optimization with Application of Transit Signal Priority to an Isolated Intersection
• Turn Pocket Blockage and Spillback Models: Applications for Signal Timing and Capacity Analysis
• Visual Education Tools to Illustrate Coordinated System Operation