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 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.

[1]  Torbjörn Falkmer,et al.  Is there a pattern in European bus and coach incidents? A literature analysis with special focus on injury causation and injury mechanisms. , 2005, Accident; analysis and prevention.

[2]  F Mannering,et al.  Effect of roadway geometrics and environmental factors on rural freeway accident frequencies. , 1995, Accident; analysis and prevention.

[3]  Robert B Noland,et al.  The effect of infrastructure and demographic change on traffic-related fatalities and crashes: a case study of Illinois county-level data. , 2004, Accident; analysis and prevention.

[4]  N J Garber,et al.  THE EFFECT OF SPEED, FLOW, AND GEOMETRIC CHARACTERISTICS ON CRASH RATES FOR DIFFERENT TYPES OF VIRGINIA HIGHWAYS , 2000 .

[5]  Ahmed E. Radwan,et al.  Modeling traffic accident occurrence and involvement. , 2000, Accident; analysis and prevention.

[6]  S. Miaou.  The relationship between truck accidents and geometric design of road sections: Poisson versus negative binomial regressions. , 1994, Accident; analysis and prevention.

[7]  Hoong Chor Chin,et al.  An analysis of motorcycle injury and vehicle damage severity using ordered probit models. , 2002, Journal of safety research.

[8]  Ezra Hauer,et al.  Estimation of safety at signalized intersections , 1988 .

[9]  Patrick T McCoy,et al.  ESTIMATION OF SAFETY AT TWO-WAY STOP-CONTROLLED INTERSECTIONS ON RURAL HIGHWAYS , 1993 .

[10]  J N Ivan,et al.  Differences in causality factors for single and multi-vehicle crashes on two-lane roads. , 1999, Accident; analysis and prevention.

[11]  Anders af Wåhlberg,et al.  If you can’t take the heat: Influences of temperature on bus accident rates , 2008 .

[12]  E Hauer,et al.  Overdispersion in modelling accidents on road sections and in empirical bayes estimation. , 2001, Accident; analysis and prevention.

[13]  A. Cameron,et al.  Econometric models based on count data. Comparisons and applications of some estimators and tests , 1986 .

[14]  A. Wåhlberg.  Characteristics of low speed accidents with buses in public transport. , 2002 .

[15]  Shaw-Pin Miaou,et al.  Modeling Traffic Crash-Flow Relationships for Intersections: Dispersion Parameter, Functional Form, and Bayes Versus Empirical Bayes Methods , 2003 .

[16]  M J Maher,et al.  A comprehensive methodology for the fitting of predictive accident models. , 1996, Accident; analysis and prevention.

[17]  H Lum,et al.  Modeling vehicle accidents and highway geometric design relationships. , 1993, Accident; analysis and prevention.

[18]  F Mannering,et al.  Modeling accident frequencies as zero-altered probability processes: an empirical inquiry. , 1997, Accident; analysis and prevention.

[19]  Sarath C. Joshua,et al.  Estimating truck accident rate and involvements using linear and poisson regression models , 1990 .

[20]  Eric Rodgman,et al.  CHARACTERISTICS AND SOLUTIONS RELATED TO BUS TRANSIT ACCIDENTS , 1993 .

[21]  Anders af Wåhlberg.  Characteristics of low speed accidents with buses in public transport. , 2002 .

[22]  Jörgen Larsson.  Injuries in road accidents involving buses during 2003--2006: - with particular reference to children's school journeys , 2008 .

[23]  Hsin-Li Chang,et al.  MODELING THE RELATIONSHIP OF ACCIDENTS TO MILES TRAVELED , 1986 .

[24]  Fred L. Mannering,et al.  The relationship among highway geometrics, traffic-related elements and motor-vehicle accident frequencies , 1998 .

[25]  Fred Mannering,et al.  Impact of roadside features on the frequency and severity of run-off-roadway accidents: an empirical analysis. , 2002, Accident; analysis and prevention.

[26]  Thierry Brenac,et al.  The indirect involvement of buses in traffic accident processes , 2005 .

[27]  Dominique Lord,et al.  Poisson, Poisson-gamma and zero-inflated regression models of motor vehicle crashes: balancing statistical fit and theory. , 2005, Accident; analysis and prevention.

[28]  Corinne Peek-Asa,et al.  Incidence and characteristics of school bus crashes and injuries. , 2009, Accident; analysis and prevention.

[29]  G Maycock,et al.  ACCIDENTS AT 4-ARM ROUNDABOUTS , 1984 .

[30]  Joseph L. Schofer,et al.  ANALYSIS OF BUS TRANSIT ACCIDENTS: EMPIRICAL, METHODOLOGICAL AND POLICY ISSUES. FINAL REPORT , 1989 .