Turning at intersections and pedestrian injuries

Bahman Sayyar Roudsari, Robert Kaufman, Thomas Koepsell

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Objective. To evaluate if precrash vehicle movement is associated with the severity of pedestrian injury. Methods. We used comprehensive information on pedestrian, vehicle, and injury-related characteristics gathered in the Pedestrian Crash Data Study (PCDS), conducted by the National Highway Traffic Safety Administration (NHTSA) (1994-1998). The odds ratio of severe injuries (injury severity score ≥ 15) and crash fatality rate for right- and left-turn collisions at intersection compared with straight vehicle movement were compared using a logistic regression model and taking into consideration the type of vehicle and age of the pedestrians as potential effect modifiers. Later we evaluated the intermediate effect of impact speed on the association by adding it to the logistic regression model. Results. Of 255 collisions eligible for this analysis, the proportion of pedestrian hit during straight movement, right turns, and left turns were 48%, 32%, and 10%, respectively. Sixty percent of the pedestrians in left-turn crashes and 67% of them in right-turn collisions were hit from their left side. For straight movements the pedestrians were equally likely to be struck beginning from the left or right side of the street. After adjustment for pedestrian's age, vehicle movement was a significant predictor of severe injuries (p < 0.0001) and case fatality (p = 0.003). The association between vehicle precrash movement and severe injuries (p = 0.551) and case fatality (p = 0.912) vanished after adjusting for impact speed. This indicated that the observed association was probably the result of the difference in impact speed and not the precrash movement of the vehicle. Conclusion. Pedestrian safety interventions that aim at environmental modifications, such as crosswalk repositioning, might be the most efficient means in reducing right- or left-turn collisions at intersection, while pedestrians' behavioral modifications should be the priority for alleviating the magnitude of the collisions that happen in vehicles' straight movements.

Original languageEnglish (US)
Pages (from-to)283-289
Number of pages7
JournalTraffic Injury Prevention
Volume7
Issue number3
DOIs
StatePublished - Sep 1 2006
Externally publishedYes

Fingerprint

pedestrian
Wounds and Injuries
Logistic Models
Logistics
Pedestrian safety
Crosswalks
logistics
Pedestrians
Safety
regression
Injury Severity Score
traffic safety
Odds Ratio

Keywords

  • Crosswalk
  • Environmental Modification
  • Intersection
  • Left Turn
  • Pedestrian Injury
  • Right Turn

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Public Health, Environmental and Occupational Health

Cite this

Turning at intersections and pedestrian injuries. / Sayyar Roudsari, Bahman; Kaufman, Robert; Koepsell, Thomas.

In: Traffic Injury Prevention, Vol. 7, No. 3, 01.09.2006, p. 283-289.

Research output: Contribution to journalArticle

Sayyar Roudsari, Bahman ; Kaufman, Robert ; Koepsell, Thomas. / Turning at intersections and pedestrian injuries. In: Traffic Injury Prevention. 2006 ; Vol. 7, No. 3. pp. 283-289.
@article{79ecd7a22c354d80b33984ed4c1a9b5a,
title = "Turning at intersections and pedestrian injuries",
abstract = "Objective. To evaluate if precrash vehicle movement is associated with the severity of pedestrian injury. Methods. We used comprehensive information on pedestrian, vehicle, and injury-related characteristics gathered in the Pedestrian Crash Data Study (PCDS), conducted by the National Highway Traffic Safety Administration (NHTSA) (1994-1998). The odds ratio of severe injuries (injury severity score ≥ 15) and crash fatality rate for right- and left-turn collisions at intersection compared with straight vehicle movement were compared using a logistic regression model and taking into consideration the type of vehicle and age of the pedestrians as potential effect modifiers. Later we evaluated the intermediate effect of impact speed on the association by adding it to the logistic regression model. Results. Of 255 collisions eligible for this analysis, the proportion of pedestrian hit during straight movement, right turns, and left turns were 48{\%}, 32{\%}, and 10{\%}, respectively. Sixty percent of the pedestrians in left-turn crashes and 67{\%} of them in right-turn collisions were hit from their left side. For straight movements the pedestrians were equally likely to be struck beginning from the left or right side of the street. After adjustment for pedestrian's age, vehicle movement was a significant predictor of severe injuries (p < 0.0001) and case fatality (p = 0.003). The association between vehicle precrash movement and severe injuries (p = 0.551) and case fatality (p = 0.912) vanished after adjusting for impact speed. This indicated that the observed association was probably the result of the difference in impact speed and not the precrash movement of the vehicle. Conclusion. Pedestrian safety interventions that aim at environmental modifications, such as crosswalk repositioning, might be the most efficient means in reducing right- or left-turn collisions at intersection, while pedestrians' behavioral modifications should be the priority for alleviating the magnitude of the collisions that happen in vehicles' straight movements.",
keywords = "Crosswalk, Environmental Modification, Intersection, Left Turn, Pedestrian Injury, Right Turn",
author = "{Sayyar Roudsari}, Bahman and Robert Kaufman and Thomas Koepsell",
year = "2006",
month = "9",
day = "1",
doi = "10.1080/15389580600660153",
language = "English (US)",
volume = "7",
pages = "283--289",
journal = "Traffic Injury Prevention",
issn = "1538-9588",
publisher = "Taylor and Francis Ltd.",
number = "3",

}

TY - JOUR

T1 - Turning at intersections and pedestrian injuries

AU - Sayyar Roudsari, Bahman

AU - Kaufman, Robert

AU - Koepsell, Thomas

PY - 2006/9/1

Y1 - 2006/9/1

N2 - Objective. To evaluate if precrash vehicle movement is associated with the severity of pedestrian injury. Methods. We used comprehensive information on pedestrian, vehicle, and injury-related characteristics gathered in the Pedestrian Crash Data Study (PCDS), conducted by the National Highway Traffic Safety Administration (NHTSA) (1994-1998). The odds ratio of severe injuries (injury severity score ≥ 15) and crash fatality rate for right- and left-turn collisions at intersection compared with straight vehicle movement were compared using a logistic regression model and taking into consideration the type of vehicle and age of the pedestrians as potential effect modifiers. Later we evaluated the intermediate effect of impact speed on the association by adding it to the logistic regression model. Results. Of 255 collisions eligible for this analysis, the proportion of pedestrian hit during straight movement, right turns, and left turns were 48%, 32%, and 10%, respectively. Sixty percent of the pedestrians in left-turn crashes and 67% of them in right-turn collisions were hit from their left side. For straight movements the pedestrians were equally likely to be struck beginning from the left or right side of the street. After adjustment for pedestrian's age, vehicle movement was a significant predictor of severe injuries (p < 0.0001) and case fatality (p = 0.003). The association between vehicle precrash movement and severe injuries (p = 0.551) and case fatality (p = 0.912) vanished after adjusting for impact speed. This indicated that the observed association was probably the result of the difference in impact speed and not the precrash movement of the vehicle. Conclusion. Pedestrian safety interventions that aim at environmental modifications, such as crosswalk repositioning, might be the most efficient means in reducing right- or left-turn collisions at intersection, while pedestrians' behavioral modifications should be the priority for alleviating the magnitude of the collisions that happen in vehicles' straight movements.

AB - Objective. To evaluate if precrash vehicle movement is associated with the severity of pedestrian injury. Methods. We used comprehensive information on pedestrian, vehicle, and injury-related characteristics gathered in the Pedestrian Crash Data Study (PCDS), conducted by the National Highway Traffic Safety Administration (NHTSA) (1994-1998). The odds ratio of severe injuries (injury severity score ≥ 15) and crash fatality rate for right- and left-turn collisions at intersection compared with straight vehicle movement were compared using a logistic regression model and taking into consideration the type of vehicle and age of the pedestrians as potential effect modifiers. Later we evaluated the intermediate effect of impact speed on the association by adding it to the logistic regression model. Results. Of 255 collisions eligible for this analysis, the proportion of pedestrian hit during straight movement, right turns, and left turns were 48%, 32%, and 10%, respectively. Sixty percent of the pedestrians in left-turn crashes and 67% of them in right-turn collisions were hit from their left side. For straight movements the pedestrians were equally likely to be struck beginning from the left or right side of the street. After adjustment for pedestrian's age, vehicle movement was a significant predictor of severe injuries (p < 0.0001) and case fatality (p = 0.003). The association between vehicle precrash movement and severe injuries (p = 0.551) and case fatality (p = 0.912) vanished after adjusting for impact speed. This indicated that the observed association was probably the result of the difference in impact speed and not the precrash movement of the vehicle. Conclusion. Pedestrian safety interventions that aim at environmental modifications, such as crosswalk repositioning, might be the most efficient means in reducing right- or left-turn collisions at intersection, while pedestrians' behavioral modifications should be the priority for alleviating the magnitude of the collisions that happen in vehicles' straight movements.

KW - Crosswalk

KW - Environmental Modification

KW - Intersection

KW - Left Turn

KW - Pedestrian Injury

KW - Right Turn

UR - http://www.scopus.com/inward/record.url?scp=33749012559&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33749012559&partnerID=8YFLogxK

U2 - 10.1080/15389580600660153

DO - 10.1080/15389580600660153

M3 - Article

C2 - 16990243

AN - SCOPUS:33749012559

VL - 7

SP - 283

EP - 289

JO - Traffic Injury Prevention

JF - Traffic Injury Prevention

SN - 1538-9588

IS - 3

ER -