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Assessment of Interstate Safety Investment Priorities in Washington State
| 题名： | Assessment of Interstate Safety Investment Priorities in Washington State |
| 作者： | Shankar, V.; Park, M.; Oh, J.; Sathyanarayanan, S.; Sharma, V. |
| 关键词： | interstate network##Interstate transportation##Accident risk##Investment##Safety benefits##Strategic risk management##Repeat location identification##Recommendations## |
| 摘要： | The Washington State Department of Transportation (WSDOT) commissioned the current study, targeting the entire interstate mainline network in Washington State, to provide strategic direction to multi-biennial investment interstate locations that offer the greatest return in terms of cumulative and annualized safety benefits. The objectives of this study were to prioritize interstate locations strategically in terms of risk of high social cost, while targeting locations that repeat in nature. As such, the methodological questions that arise relate to the following: what measurements are required to comprehensively address the “strategic risk evaluation” aspect, and what measurements are required to adequately address the “repeat location identification” aspect. Using a step-wise procedure to systematically assess mainline interstate accident risk, a multi-objective approach was employed in order to factor in multiple criteria for ranking of segments, while accounting for multiple accident types as inputs in the ranking process. The planned scope of this study produced a target priority list of 202 locations with a total length of 154.5 miles. This list should be evaluated in detail for scoping improvements, associated costs and benefits prior to evaluating locations in the “tracking list.” The next step in ensuring implementation and successful deployment of this procedure will be to carefully evaluate cost improvement strategies and estimate associated benefits. Once costs and benefits are computed, one can systematically proceed to evaluate various measures of cost efficiency and effectiveness using lifecycle and annualized benefits and costs. |
| 总页数： | 24 |
| 报告类型： | 科技报告 |
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