Effect of bus size and operation to crash occurrences

This paper evaluates roadway and operational factors considered to influence crashes involving buses. Factors evaluated included those related to bus sizes and operation services. Negative binomial (NB) and multinomial logit (MNL) models were used in linearizing and quantifying these factors with re...

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Bibliographic Details
Published in:Accident analysis and prevention 2010-11, Vol.42 (6), p.2063-2067
Main Authors: Chimba, Deo, Sando, Thobias, Kwigizile, Valerian
Format: Article
Language:English
Subjects:
Acceleration - adverse effects
Accidents, Traffic - prevention & control
Accidents, Traffic - statistics & numerical data
Bus crashes
Bus size
Bus stop frequencies
Causality
City Planning
Cross-Sectional Studies
Databases, Factual
Environment Design
Florida
Humans
Injury Severity Score
Models, Statistical
Motor Vehicles - statistics & numerical data
Multinomial logit
Negative binomial
Probability
Safety
Statistics as Topic
Wounds and Injuries - epidemiology
Wounds and Injuries - prevention & control
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Summary:This paper evaluates roadway and operational factors considered to influence crashes involving buses. Factors evaluated included those related to bus sizes and operation services. Negative binomial (NB) and multinomial logit (MNL) models were used in linearizing and quantifying these factors with respect to crash frequency and injury severities, respectively. The results showed that position of the bus travel lane, presence or absence of on-street shoulder parking, posted speed limit, lane width, median width, number of lanes per direction and number of vehicles per lane has a higher influence on bus crashes compared to other roadway and traffic factors. Wider lanes and medians were found to reduce probability of bus crashes while more lanes and higher volume per lane were found to increase the likelihood of occurrences of bus-related crashes. Roadways with higher posted speed limits excluding freeways were found to have high probability of crashes compared to low speed limit roadways. Buses traveling on the inner lanes and making left turns were found to have higher probability of crashes compared to those traveling on the right most lanes. The same factors were found to influence injury severity though with varying magnitudes compared to crash frequency.
ISSN:0001-4575
1879-2057
DOI:10.1016/j.aap.2010.06.018