01593443

Component

https://doi.org/10.3141/2586-10

This paper proposes a methodology to evaluate crosswalk pedestrian safety at nighttime by using surrogate safety measures derived from thermal video data. The methodology is illustrated for two unsignalized crosswalk locations in downtown Montreal, Quebec, Canada. Video recordings from a thermal camera were used to compare nighttime and daytime safety conditions with surrogate safety measures that included vehicle approaching speed, postencroachment time (PET), yielding compliances, and conflict rates. A disaggregate measure of pedestrian exposure that excludes noninteracting road users is also proposed. A thermal camera was used to alleviate issues pertaining to low visibility at night for video analysis when road users, especially pedestrians, are difficult to track. The results showed that the thermal-video–based methodology could effectively collect interaction data at night regardless of lighting conditions. Through the use of thermal video data and the methodology proposed in this paper, the interactions between crossing pedestrians and motor vehicles, with related measures such as PET and speed, could be analyzed to evaluate the effect of different crosswalk treatments on pedestrian safety in low-visibility conditions.

01595162

16-7020

English

pp 90–99

2016

Transportation Research Record: Journal of the Transportation Research Board

9780309441322

Print

Figures (6) ; Maps; Photos; References (35) ; Tables (5)

Case studies; Crosswalks; Night visibility; Pedestrian safety; Pedestrian vehicle interface; Risk analysis; Thermal imagery; Traffic conflicts; Video

Nonsignalized intersections

Montreal (Canada)

Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Safety and Human Factors

TRIS, TRB, ATRI

Jan 12 2016 7:03PM

• Adaptive Walk Intervals
• Analysis of Road User Behavior and Safety During New York City’s Summer Streets Program
• Countdown Pedestrian Signals With and Without the Flashing Hand: Field Study
• Effect of Distractions on a Pedestrian’s Waiting Behavior at Traffic Signals: Observational Study
• Effectiveness of Changes in Street Layout and Design for Reducing Barriers to Walking
• Facility-Demand Models of Peak Period Pedestrian and Bicycle Traffic: Comparison of Fully Specified and Reduced-Form Models
• How Far Is Too Far? Providing Safe and Comfortable Walking Environments
• Multiobjective Evaluation of Midblock Crosswalks on Urban Streets Based on TOPSIS and Entropy Methods
• Panic That Spreads Sociobehavioral Contagion in Pedestrian Evacuations
• Pedestrian Gap Acceptance Behavior in Street Designs with Elements of Shared Space
• Road User Behaviors at Pedestrian Hybrid Beacons
• Road, Traffic, and Human Factors of Pedestrian Crossing Behavior: Integrated Choice and Latent Variables Models
• Variables Influencing Efficacy of Gateway In-Street Sign Configuration on Yielding at Crosswalks