United States Department of Transportation
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Design Guidelines and Other Considerations for Strategic Arterial Streets
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1991-01-01
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[PDF-5.81 MB]
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Edition:Interim Report
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Abstract:The overall objective of Study 1107 is to discover an alternative means of increasing the supply of high-quality traffic service in urban areas. Urban freeways have, for a variety of reasons, become overloaded and difficult to augment. A plausible alternative is to improve the quality and scope of the urban arterial street system so that these streets can supplement the services furnished by the freeway system. For the purposes of this study, these improved urban arterial streets are designated as "strategic arterial streets" (SAS). The concept of the SAS addressed in this study is that of streets providing a higher level of traffic service and productivity than existing urban arterial streets but less than that afforded by freeways. Systems analysis shows that if arterial streets operate at higher speeds and have sufficient capacity, they can divert significant amounts of traffic from freeways. The problem is: what are the factors which affect the speed and capacity of arterial streets? The guidelines presented in this report (1107-4) address the principal factors which affect the quality of service and productivity of these streets. The principal factors are geometric design, control of access, and operational controls. Geometric design features discussed are cross sections, auxiliary lanes, median barriers, intersection layouts, access driveways, and grade separations. The consequences and means of control of access are addressed. The effect and frequency of traffic-signalized intersections on travel speed are addressed. Additional issues addressed are transit operations, pedestrian activity, implementation, and future directions.
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