01476150

Component

https://doi.org/10.3141/2386-06

http://scholar.google.com...gers&publication_year=2013

Highway safety evaluation has traditionally been performed by using crash data, although this method has limitations in terms of timeliness and efficiency. Previous studies show that the use of surrogate safety data allows for faster evaluation of safety in comparison with the significantly longer time horizon required for collecting crash data. However, the predictive capability of surrogate measures is still an area of ongoing research. Previous studies have often resulted in inconsistent findings for the relationship between surrogates and crashes, one of the primary reasons being inconsistent definitions of a conflict. This study evaluated the effectiveness of postencroachment time (PET) as a surrogate measure for the propensity of crashes between left-turning vehicles and opposing through vehicles at four-leg signalized intersections. The primary method of data collection was through video recording with postprocessing. Custom semiautomatic video processing software was used to reduce the video to a us.able format for analysis. The study evaluated the effectiveness of PET as a surrogate measure by comparing three variations of the PET measure with crash history. This comparison showed that the threshold value of PET played an important role in establishing its correlation with crashes, with the best results at a threshold as low as 1 s.

01514599

13-0839

English

pp 42–51

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309287036

Print

Figures (6) ; Photos; References (27) ; Tables (1)

Crash analysis; Crash data; Data collection; Four leg intersections; Highway safety; Left turns; Opposing traffic; Signalized intersections

Encroachment

Data and Information Technology; Highways; Safety and Human Factors; I82: Accidents and Transport Infrastructure

TRIS, TRB, ATRI

Feb 5 2013 12:17PM

• Analysis of Crash Severity Based on Vehicle Damage and Occupant Injuries
• Application of Stochastic Gradient Boosting Technique to Enhance Reliability of Real-Time Risk Assessment: Use of Automatic Vehicle Identification and Remote Traffic Microwave Sensor Data
• Assessment of Exposure Proxies for Macroscopic Road Safety Prediction
• Crash Databases in Australasia, the European Union, and the United States: Review and Prospects for Improvement
• Developing Truck Corridor Crash Severity Index
• Effects of Public Rest Areas on Fatigue-Related Crashes
• Evolutionary Game Theoretic Approach to Rear-End Events on Congested Freeway
• Examining Heterogeneity of Driver Behavior with Temporal and Spatial Factors
• Exploring Behavioral Responses of Motorists to Risk-Based Charging Mechanisms
• Feasibility of Incorporating Reliability Analysis in Traffic Safety Investigation
• Full Bayes Before-and-After Evaluation of Traffic Safety Improvements in City of Edmonton, Canada
• Hot-Spot Identification: Categorical Binary Model Approach
• Identification of Crash-Contributing Factors: Effects of Spatial Autocorrelation and Sample Data Size
• Identifying Primary and Secondary Crashes from Spatiotemporal Crash Impact Analysis
• Motion Prediction Methods for Surrogate Safety Analysis
• On-Duty Struck-By Crashes: Characteristics and Contributing Factors
• Safety and Operational Benefits of Variable Speed Limits Under Different Traffic Conditions and Driver Compliance Levels
• Safety Evaluation of Horizontal Curves on Rural Undivided Roads
• Screening Naturalistic Driving Study Data for Safety-Critical Events
• Surrogate Safety Measure for Simulation-Based Conflict Study