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Estimating countermeasure effects for reducing collisions at highway-railway grade crossings.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Saccomanno, Frank F. Park, Peter Y. Fu, Liping |
| Copyright Year | 2007 |
| Abstract | Frequently transportation engineers are required to make difficult safety investment decisions in the face of uncertainty concerning the cost-effectiveness of different countermeasures. For certain types of highway-railway grade crossings, this problem is further aggravated due to the lack of observed before and after collision data that reflects the impact of specific countermeasures. This study proposes a Bayesian data fusion method as an attempt to overcome these challenges. In this framework, we make use of previous research findings on the effectiveness of a given countermeasure, which could vary by jurisdictions and operating conditions to obtain a priori inference on its expected effects. We then use locally calibrated models, which are valid for a specific jurisdiction, to develop the current best estimates regarding the countermeasure effects. By using a Bayesian framework, these two sources are integrated to obtain the posterior distribution of the countermeasure effectiveness. As a result, the outputs provide information not only of the expected collision response to a specific countermeasure but also its variance and corresponding probability distribution for a range of likely values. Examples from Canadian highway-railway grade crossing data are used to illustrate the proposed methodology and the specific effects of prior knowledge and data likelihood on the combined estimates of countermeasure effects. |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.aap.2006.08.016 |
| PubMed reference number | 17087912 |
| Journal | Medline |
| Volume Number | 39 |
| Issue Number | 2 |
| Alternate Webpage(s) | http://www.civil.uwaterloo.ca/iTSS/papers/2007-5%20(Countermeasure%20effets%20of%20reducing%20collisions%20at%20crossings).pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.aap.2006.08.016 |
| Journal | Accident; analysis and prevention |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
