01374318

Component

https://doi.org/10.3141/2280-10

http://scholar.google.com...lman&publication_year=2012

This study used a heteroscedastic ordered probit model to distinguish the effects of vehicle weight, footprint, and height on the severity of injuries sustained by vehicle occupants while controlling for many occupant, roadway, and other characteristics. Model results suggest that the impact of physical vehicle attributes on crash outcomes depends on the number of vehicles involved and is typically more significant in one-car crashes than in two-car crashes. Although vehicles with larger footprints and shorter vehicles were estimated to reduce the risk of serious injury for their occupants in single-vehicle crashes, they appeared to be less crashworthy in two-vehicle collisions. Heavier vehicles were anticipated to be more crashworthy regardless of crash type. Under evolving U.S. fuel economy standards, moderate changes in the weights, footprints, and heights of light-duty vehicles are estimated to have a relatively small impact on crash severities, whereas other factors, such as seat belt use, driver intoxication, and the presence of roadway curvature and grade, are estimated to influence crash outcomes much more noticeably.

01474121

12-1805

English

pp 89–99

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309263214

Print

Figures; References; Tables

Crash severity; Crashworthiness; Heteroscedasticity; Injury severity; Multiple vehicle crashes; Probits; Single vehicle crashes; Traffic crashes; Vehicle weight

Ordered probit models; Vehicle height

Data and Information Technology; Highways; Safety and Human Factors; Vehicles and Equipment; I91: Vehicle Design and Safety

TRIS, TRB, ATRI

Feb 8 2012 5:05PM

• Analysis of Crash Frequency in Work Zones with Focus on Police Enforcement
• Application of Different Exposure Measures in Development of Planning-Level Zonal Crash Prediction Models
• Assessment of Interaction of Crash Occurrence, Mountainous Freeway Geometry, Real-Time Weather, and Traffic Data
• Bayesian Updating Approach for Real-Time Safety Evaluation with Automatic Vehicle Identification Data
• Braking News: Link Between Crash Severity and Crash Avoidance Maneuvers
• Discretization of Road Networks for Safety Evaluation with Consideration of Intersection Impact Zones
• Entropy and Accidents
• Feasibility of Computer Vision-Based Safety Evaluations: Case Study of a Signalized Right-Turn Safety Treatment
• How Far from Optimal Are Current Advisory Speeds? Analysis Based on Safety Performance
• Improving Transferability of Safety Performance Functions by Bayesian Model Averaging
• Integrating Observational and Traffic Simulation Models for Priority Ranking of Unsafe Intersections
• Investigating Effect of Collision Aggregation on Safety Evaluations with Models of Multivariate Linear Intervention: Case Study of Program to Upgrade Signal Heads
• Linear and Nonlinear Safety Intervention Models: Novel Methods Applied to Evaluation of Shoulder Rumble Strips
• Long-Term Safety Trends as a Function of Vehicle Ownership in 26 Countries
• Macrolevel Model Development for Safety Assessment of Road Network Structures
• Relationship Between Freeway Flow Parameters and Safety and Its Implications for Hard Shoulder Running
• Relationship Between Traffic Density, Speed, and Safety and Its Implications for Setting Variable Speed Limits on Freeways
• Safety Effectiveness of Super 2 Highways in Texas
• Value of Research on Safety Effects of Actions