United States Department of Transportation
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Freeway Level of Service as Influenced by Volume and Capacity Characteristics
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1965-01-01
[PDF-2.72 MB]
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Abstract:This report deals with two main topics which affect traffic operation, and thus the level of service, on freeways. They are volume characteristics and capacity characteristics. Two main topics under volume characteristics are considered and developed. The first is an analysis of such peak flow characteristics as peak rates of flow, correlation with various parameters, and a comparison of peak two-hour volumes with peak one-hour volumes. The second main topic under volume characteristics deals with studies of lane distribution of vehicles on freeways with particular attention given to the effect of entering and exiting vehicles on the lane use distributions. The second section deals with freeway capacity characteristics, including a theoretical approach to providing a rational relationship between capacity and level of service. It is significant that the first section deals with freeway demand and the second with capacity. In the third section, applications are made of these demand and capacity characteristics to freeway design and operations.
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