Effects of stationary work zones on motorway crashes

Abstract The empirical Bayes (EB) before-and-after method was applied in this study in order to evaluate the change in the expected crash frequencies associated with the installation of work zones on motorways. A dataset of 15,570 stationary work zones including crash data, road segment data and traffic data was analyzed in order to estimate crash modification factors (CMFs) associated with different layout configurations of work zones. The findings of this research indicated a general increase in crash frequencies due to the installation of work zones. Furthermore the analysis has shown that all layout configurations that involve a crossover are very critical for safety: the highest CMFs are observed for the configurations with only a partial diversion of traffic to the opposite carriageway (with part of the traffic remaining in the ordinary flow direction and part travelling in the opposite carriageway).

[1]  Francesco Corsi,et al.  Transferability of the Highway Safety Manual Freeway Model to the Italian Motorway Network , 2014 .

[2]  Bhagwant Persaud,et al.  Comparison of empirical Bayes and full Bayes approaches for before-after road safety evaluations. , 2010, Accident; analysis and prevention.

[3]  Frank N Lisle,et al.  EVALUATION OF TIMBER BARRICADES AND PRECAST CONCRETE TRAFFIC BARRIERS FOR USE IN HIGHWAY CONSTRUCTION AREAS , 1978 .

[4]  Frank Gross,et al.  A Guide to Developing Quality Crash Modification Factors , 2010 .

[5]  Nagui M. Rouphail,et al.  COMPARATIVE STUDY OF SHORT- AND LONG-TERM URBAN FREEWAY WORK ZONES , 1988 .

[6]  Zoltan Anthony Nemeth,et al.  ACCIDENT CHARACTERISTICS BEFORE, DURING, AND AFTER SAFETY UPGRADING PROJECTS ON OHIO'S RURAL INTERSTATE SYSTEM , 1978 .

[7]  Kaan Ozbay,et al.  Work Zone Safety Analysis and Modeling: A State-of-the-Art Review , 2015, Traffic injury prevention.

[8]  Eun Sug Park,et al.  A fully Bayesian multivariate approach to before-after safety evaluation. , 2010, Accident; analysis and prevention.

[9]  S. Emerson,et al.  AASHTO (American Association of State Highway and Transportation Officials). 2001. A Policy on Geometric Design of Highways and Streets. Fourth Edition. Washington, D.C. , 2007 .

[10]  A. Khattak,et al.  Effects of work zone presence on injury and non-injury crashes. , 2002, Accident; analysis and prevention.

[11]  Francesca La Torre,et al.  Calibration of the Highway Safety Manual's Accident Prediction Model for Italian Secondary Road Network , 2009 .

[12]  Kumares C. Sinha,et al.  Analysis of Crash Rates at Interstate Work Zones in Indiana , 1996 .

[13]  Tae-Jun Ha,et al.  DETAILED STUDY OF ACCIDENT EXPERIENCE IN CONSTRUCTION AND MAINTENANCE ZONES , 1995 .

[14]  Ezra Hauer,et al.  OBSERVATIONAL BEFORE-AFTER STUDIES IN ROAD SAFETY -- ESTIMATING THE EFFECT OF HIGHWAY AND TRAFFIC ENGINEERING MEASURES ON ROAD SAFETY , 1997 .

[15]  Bhagwant Persaud,et al.  Empirical Bayes before-after safety studies: lessons learned from two decades of experience and future directions. , 2007, Accident; analysis and prevention.

[16]  J W Hall,et al.  CHARACTERISTICS OF CONSTRUCTION-ZONE ACCIDENTS , 1989 .

[17]  Jerry L Graham,et al.  ACCIDENT AND SPEED STUDIES IN CONSTRUCTION ZONES , 1977 .