摘要: |
This report develops a methodology for the Explicit Consideration of Safety in the Transportation Planning Process by focusing on science-based and data-driven project selection, which considers susceptibility to cost-effective correction rather than simply observed frequency and severity of crashes. Only a very small percentage of projects (4 percent or less in Colorado) are exclusively safety motivated and funded. Most projects are aimed at some combination of mobility,pavement preservation, maintenance, improved air quality, operations as well as safety. Safety consideration is present explicitly or implicitly in most transportation infrastructure projects and the challenge is to bring safety to a common denominator with other goals of the project. The actual planning process is influenced not only by scientifically estimated objective benefits and costs, but also by the availability of funding, political climate, and other intangible factors.Nevertheless, with all other things being equal, the proposed methodology provides a quantitative framework for decision makers in selecting and ranking transportation projects. |