ArticleAccident; analysis and prevention2013
On-road bicycle facilities and bicycle crashes in Iowa, 2007-2010.
Article in Accident; analysis and prevention, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
14 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Cycling infrastructure for reducing cycling injuries in cyclists.The Cochrane database of systematic reviews · 2015Pooled it
- Effectiveness of road safety interventions: An evidence and gap map.Campbell systematic reviews · 2024Article
- An analysis of bicycle accidents with respect to spatial heterogeneity.Scientific reports · 2023Article
- Analysis of Risky Riding Behavior Characteristics of the Related Road Traffic Injuries of Electric Bicycle Riders.International journal of environmental research and public health · 2023Article
- Risk Factors for Road-Traffic Injuries Associated with E-Bike: Case-Control and Case-Crossover Study.International journal of environmental research and public health · 2022Article
- Weekday bicycle traffic and crash rates during the COVID-19 pandemic.Journal of transport & health · 2021Article
- Analysis of Bicycle-Motor Vehicle Crashes in San Antonio, Texas.International journal of environmental research and public health · 2021Article
- Incidence and Profile of Severe Cycling Injuries After Bikeway Infrastructure Changes.Journal of community health · 2020Article
- On-road bicycle lane types, roadway characteristics, and risks for bicycle crashes.Accident; analysis and prevention · 2019Article
- Built environment effects on bike crash frequency and risk in Beijing.Journal of safety research · 2018Article
- Examination of adult and child bicyclist safety-relevant events using naturalistic bicycling methodology.Accident; analysis and prevention · 2017Article
- Bicycle Use and Cyclist Safety Following Boston's Bicycle Infrastructure Expansion, 2009-2012.American journal of public health · 2016Article
- Database improvements for motor vehicle/bicycle crash analysis.Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention · 2015Article
- Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors.
Funding
Abstract
purposeAn average of 611 deaths and over 47,000 bicyclists are injured in traffic-related crashes in the United States each year. Efforts to increase bicycle safety are needed to reduce and prevent injuries and fatalities, especially as trends indicate that ridership is increasing rapidly. The objective of this study was to evaluate the effect of bicycle-specific roadway facilities (e.g., signage and bicycle lanes) in reducing bicycle crashes.
methodsWe conducted a case site-control site study of 147 bicycle crash-sites identified from the Iowa Department of Transportation crash database from 2007 to 2010 and 147 matched non-crash sites. Control sites were randomly selected from intersections matched to case sites on neighborhood (census block group) and road classification (arterial, feeder, collector, etc.). We examined crash risk by any on-road bicycle facility present and by facility type (pavement markings--bicycle lanes and shared lane arrows, bicycle-specific signage, and the combination of markings and signage), controlling for bicycle volume, motor vehicle volume, street width, sidewalks, and traffic controls.
resultsA total of 11.6% of case sites and 15.0% of controls had an on-road bicycle facility. Case intersections had higher bicycle volume (3.52 vs. 3.34 per 30 min) and motor vehicle volume (248.77 vs. 205.76 per 30 min) than controls. Our results are suggestive that the presence of an on-road bicycle facility decreases crash risk by as much as 60% with a bicycle lane or shared lane arrow (OR=0.40, 95% CI=0.09-1.82) and 38% with bicycle-specific signage (OR=0.62, 95% CI=0.15-2.58).
conclusionsInvestments in bicycle-specific pavement markings and signage have been shown to be beneficial to traffic flow, and our results suggest that they may also reduce the number of bicycle-motor vehicle crashes and subsequent injuries and fatalities. As a relatively low-cost traffic feature, community considerations for further implementation of these facilities are justified.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.