Aesthetic and Environmental Considerations in the Design of Elevated Transportation Structures.




This report addresses issues related to assessing or anticipating visual impacts of elevated transportation structures upon urban settings. Two alternative approaches are outlined for assessing negative impacts of elevated structures upon different settings. The compatibility matrix approach cross-references characteristics of an existing or proposed structure with features of a particular setting to identify conflicts. The case study approach graphically portrays each setting with and without the existing or proposed structure in place to illustrate comparative changes (impacts). Nine hypothetical case studies are presented as examples. Various considerations of ways to improve existing elevated transportation structures are offered,including general restoration noise control and lighting. Considerations are also offered for ways to improve the conditions of elevated train stations and pedestrian skyways. Recommendations for planning new elevated structures are presented.



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