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Information and Transportation Choices, Long- and Short-Term, that Link Sustainability and Livability
| 题名： | Information and Transportation Choices, Long- and Short-Term, that Link Sustainability and Livability |
| 作者： | Merlin, L.; Levine, J.; Grengs, J. |
| 关键词： | Transportation choices##Transportation mobility##Accessibility analysis##Mobility improvement projects##Accessibility impacts##Project models##Metrics model## |
| 摘要： | Transportation plans and projects are typically evaluated, both prospectively and retrospectively, with metrics of mobility, notably highway level of service. This practice implicitly treats mobility improvements as desirable. Yet mobility improvements can induce land-use change in the form of either a spreading or a clustering of origins and destinations. Where spreading occurs, the induced land-use change can degrade, neutralize, or even reverse the accessibility impacts of the transportation investments. By contrast, where origin-destination clustering is induced, the land-use effects can enhance the accessibility impacts of the transportation investment. For these reasons, an evaluation of transportation projects based in accessibility—which is the fundamental purpose of transportation—must first project land-use impacts of the transportation project before its impacts may be gauged. This implies a reformed transportation-planning practice that does not stop at mobility but evaluates transportation plans and projects through metrics of accessibility. This report demonstrates an approach to accessibility-based evaluation of transportation projects, using two plans in San Antonio, TX. Land-use impacts of the transportation plans are first modeled using TELUM, a freely available transportation/land-use model funded by the Federal Highway Administration and chosen because of its availability to transportation planners in local practice. After projecting land-use implications, auto-based accessibility to work is modeled for the two sets of transportation plans. |
| 总页数： | 27 |
| 报告类型： | 科技报告 |
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