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Details

Single Point Urban Interchange Design and Operations Analysis.

PB92167113

Publication Date	1991
Personal Author	Messer, C. J.; Bonneson, J. A.; Anderson, S. D.; McFarland, W. F.
Page Count	114
Abstract	The report documents current practice in design and traffic operations at existing single point urban interchanges (SPUIs) and provides guidelines for the design, operation, analysis, and cost effectiveness of SPUIs. Information is provided on the historical development of SPUIs, typical geometric and bridge design, observed traffic operations, and general traffic engineering applications. In particular, the report presents a wide variety of statistical summaries of geometric and operations data collected for 36 SPUIs, most of which were observed during a field survey of SPUI operations in 13 states conducted during the summer of 1989. Following a synthesis of these data, geometric and operational guidelines are provided for informational purposes, because there are no specific guidelines on the interchange in the 1990 AASHTO Green Book. Advantages and disadvantages of various SPUI design features are given. The report also contains guidelines for conducting cost-effectiveness studies of the SPUI as compared primarily to the Tight Urban Diamond Interchange (TUDI). A recommended methodology is presented and special SPUI features are identified which might not be familiar to local cost estimators. Updated operational user benefits estimation procedures are also given. The report concludes with a summary of research findings and recommended application guidelines for SPUIs as being a viable competitor to the TUDI for congestion relief in restricted urban conditions. In the context, the SPUI was found to be a safe and efficient interchange design alternative.
Keywords	Interchanges Highway design Urban traffic flow Urban areas Design criteria Highway characteristics Traffic control Urban highways Traffic engineering Traffic capacity Traffic flow
Source Agency	National Academy of Science Transportation Research Board
NTIS Subject Category	50A - Highway Engineering 85H - Road Transportation 91B - Transportation & Traffic Planning 43G - Transportation
Corporate Authors	Transportation Research Board, Washington, DC.; Federal Highway Administration, Washington, DC.; Texas Transportation Inst., College Station.; American Association of State Highway and Transportation Officials,
Supplemental Notes	Library of Congress catalog card no. 91-68525. Prepared in cooperation with Texas Transportation Inst., College Station. Sponsored by American Association of State Highway and Transportation Officials, Washington, DC., and Federal Highway Administration, Washington, DC.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	199214

Single Point Urban Interchange Design and Operations Analysis.

Single Point Urban Interchange Design and Operations Analysis.
PB92167113

Publication Date	1991
Personal Author	Messer, C. J.; Bonneson, J. A.; Anderson, S. D.; McFarland, W. F.
Page Count	114
Abstract	The report documents current practice in design and traffic operations at existing single point urban interchanges (SPUIs) and provides guidelines for the design, operation, analysis, and cost effectiveness of SPUIs. Information is provided on the historical development of SPUIs, typical geometric and bridge design, observed traffic operations, and general traffic engineering applications. In particular, the report presents a wide variety of statistical summaries of geometric and operations data collected for 36 SPUIs, most of which were observed during a field survey of SPUI operations in 13 states conducted during the summer of 1989. Following a synthesis of these data, geometric and operational guidelines are provided for informational purposes, because there are no specific guidelines on the interchange in the 1990 AASHTO Green Book. Advantages and disadvantages of various SPUI design features are given. The report also contains guidelines for conducting cost-effectiveness studies of the SPUI as compared primarily to the Tight Urban Diamond Interchange (TUDI). A recommended methodology is presented and special SPUI features are identified which might not be familiar to local cost estimators. Updated operational user benefits estimation procedures are also given. The report concludes with a summary of research findings and recommended application guidelines for SPUIs as being a viable competitor to the TUDI for congestion relief in restricted urban conditions. In the context, the SPUI was found to be a safe and efficient interchange design alternative.
Keywords	Interchanges Highway design Urban traffic flow Urban areas Design criteria Highway characteristics Traffic control Urban highways Traffic engineering Traffic capacity Traffic flow
Source Agency	National Academy of Science Transportation Research Board
NTIS Subject Category	50A - Highway Engineering 85H - Road Transportation 91B - Transportation & Traffic Planning 43G - Transportation
Corporate Authors	Transportation Research Board, Washington, DC.; Federal Highway Administration, Washington, DC.; Texas Transportation Inst., College Station.; American Association of State Highway and Transportation Officials,
Supplemental Notes	Library of Congress catalog card no. 91-68525. Prepared in cooperation with Texas Transportation Inst., College Station. Sponsored by American Association of State Highway and Transportation Officials, Washington, DC., and Federal Highway Administration, Washington, DC.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	199214