Urban regeneration projects in modern metropolitan areas often incorporate major changes in the structure and operations of a city's transportation system. In this paper we discuss the traffic impacts of such a project—the pedestrianization of a major arterial, in the Athens, Greece, downtown area—by apply-ing an ex-ante evaluation of the project on a city-wide level. A scenario planning approach is adopted to represent post-project traffic conditions. Findings indicate that although in the short-run traffic conditions will worsen, a potential traffic evaporation resulting from the project could significantly improve traffic and environmental conditions in the Athens downtown area.%现代城市地区城市更新项目通常与交通系统结构和运营的重要变化相结合.采用事前评价方法从城市范围层面探讨希腊雅典中心区一条主要干路改造为步行街项目的交通影响.通过构建几种情景,展现项目实施后的交通状况.研究结果显示,尽管短期交通状况会恶化,但项目带来的潜在交通消散将显著改善中心区交通和环境状况.
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