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Accession Number PB2013-103151
Title Analysis of Managed Lanes on Freeway Facilities.
Publication Date Aug 2012
Media Count 159p
Personal Author B. Schroeder N. Rouphail X. Liu Y. Wang Y. Yin
Abstract This report documents and presents the results of a study for evaluating the performance of Managed Lane (ML) facilities on freeways. A methodological framework is for analyzing freeway facilities with ML and General Purpose (GP) lanes operated in parallel. The framework acknowledges that the composition and behavior characteristics of the ML traffic stream are expected to be quite different from those for the GP lanes in terms of traffic volume, free-flow speed, capacity, vehicle type, etc. It further considers that there may still be certain levels of interactions between these two lane groups, especially for those facilities do not have physical (barrier) separations, either en route or at access points, between them. Within that framework, different modules were developed based on sensor-measured or simulation-generated data, including the characterization of ML speed-flow relationship, the frictional effect of adjacent lane traffic speed, the adjustment for cross-weave effects, and the development of side-by-side facilitywide ML and GP performance measures. Thus, the proposed methodology is sensitive to different GP and ML segment types (basic, weaving, etc.) and separation styles (none, buffer, barrier), and is capable of analyzing extended facilities across multiple time periods.
Keywords Freeways
Highway management
Managed Lanes(MLs)
Performance assessment
Traffic control
Traffic flow
Traffic stream
Transportation planning

Source Agency National Academy of Science Transportation Research Board
NTIS Subject Category 91B - Transportation & Traffic Planning
43 - Problem Solving Information for State & Local Governments
85H - Road Transportation
Corporate Author Transportation Research Board, Washington, DC. National Cooperative Highway Research Program.
Document Type Technical report
Title Note Final rept.
NTIS Issue Number 1308
Contract Number N/A

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