The impact of pedestrian countdown signals on pedestrian-motor vehicle collisions: a reanalysis of data from a quasi-experimental study.
Inj Prev
; 20(3): 155-8, 2014 Jun.
Article
in En
| MEDLINE
| ID: mdl-24065777
ABSTRACT
OBJECTIVE:
To perform a more sophisticated analysis of previously published data that advances the understanding of the efficacy of pedestrian countdown signal (PCS) installation on pedestrian-motor vehicle collisions (PMVCs), in the city of Toronto, Canada.METHODS:
This is an updated analysis of the same dataset from Camden et al. A quasi-experimental design was used to evaluate the effect of PCS on PMVC. A Poisson regression analysis, using a one-group comparison of PMVC, pre-PCS installation to post-PCS installation was used, controlling for season and temporal effects. The outcome was the frequency of reported PMVC (January 2000-December 2009). Similar models were used to analyse specific types of collisions defined by age of pedestrian, injury severity, and pedestrian and vehicle action. Incidence rate ratios with 95% CI are presented.RESULTS:
This analysis included 9262 PMVC, 2760 during or after PCS installation, at 1965 intersections. There was a 26% increase in the rate of collisions, pre to post-PCS installation (incidence rate ratio=1.26, 95% CI 1.11 to 1.42).CONCLUSIONS:
The installation of PCS at 1965 signalised intersections in the city of Toronto resulted in an increase in PMVC rates post-PCS installation. PCSs may have an unintended consequence of increasing pedestrian-motor vehicle collisions in some settings.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Accidents, Traffic
/
Public Health
/
Walking
/
City Planning
/
Motor Vehicles
/
Environment Design
/
Accident Prevention
Type of study:
Diagnostic_studies
/
Etiology_studies
/
Incidence_studies
/
Prognostic_studies
/
Risk_factors_studies
Limits:
Humans
Country/Region as subject:
America do norte
Language:
En
Journal:
Inj Prev
Journal subject:
PEDIATRIA
/
TRAUMATOLOGIA
Year:
2014
Type:
Article
Affiliation country:
Canada