
Presentation | 2013
Safety Benefits of Median Installations in Utah
- Authored by: Dr. Grant G. Schultz (PhD)
- Event: 2012 National Conference on Access Management
Brigham Young University
Outline
- Introduction
- Background
- Selection of Analysis Sites
- Analysis Procedure
- Raised Median Results
- Conclusions
Conclusions
- Hierarchical Bayesian Poisson regression is an effective method for evaluating before and after studies of traffic safety projects
- The methods are robust to the use of only small amounts of data
- Any type of crash may be modeled and multiple covariates may be included in extremely flexible ways
- This study provides an analysis of safety at locations where raised medians have been installed
- Results indicate a significant improvement in terms of both crash frequency and frequency of severe crashes along corridors where raised medians were installed
- Results from all sites show frequency of crashes reduced by 39% and frequency of severe crashes reduced by 44% after the installation of raised medians
- Raised medians are one tool to aid in meeting the goal of ZERO Fatalities in the state of Utah