Article
EVALUATING THE APPLICATION OF DIVERGING DIAMOND INTERCHANGE IN ATHENS, ALABAMA
DOI: 10.7708/ijtte.2016.6(1).04
6 / 1 / 38-50 Pages
Author(s)
Tahmina Khan - Civil and Environmental Engineering Department, University of Alabama in Huntsville, Alabama, United States -
Abstract
A diverging diamond interchange (DDI), a freeway and arterial interchange design, uses crossovers at the ramp intersections to eliminate conflicts between arterial through traffic and the left turning traffic from both the arterial and the ramps. The conventional diamond interchange (CDI) compared with the DDI has similar on-ramps and off-ramps, but there is a change in the number of lanes on the arterial. A case study has been conducted for an interchange in Athens, Alabama. The existing interchange is a conventional diamond interchange which is compared with a DDI built at the same location by using Synchro/Simtraffic as a simulation tool. The analysis focused on determining level of service and vehicle delay for the two interchange types. In this project effort was made to know if a DDI is the right solution for all interchange locations through the examination of a single location and adjustments to traffic volumes under numerous combination of turning movement scenarios where variation of capacity and the influence of proximity of adjacent intersections were also included. Finally, it was concluded that DDI cannot be an appropriate measure to improve the current CDI network for the study area since only 4 special cases it performs better than CDI. And DDI cannot be the effective traffic calming measure if it is associated with upstream or downstream intersections.
Number of downloads: 2419
Keywords:
conventional diamond interchange;
diverging diamond interchange;
traffic simulation;
delay;
Acknowledgements:
The authors would like to acknowledge the support of Alabama Department of Transportation for the funding to conduct the research leading to this article.
References:
Afshar, A.M.; Bared, J.G.; Wolf, S.; Edara, P.K. 2009. Traffic Operational Comparison of Single-Point and Diverging Diamond Interchanges. Presented at the Transportation Research Board 88th Annual Meeting, Transportation Research Board. 21 p.
Anderson, M.; Schroer, B.; Moeller, D. 2011. Simulation of the diverging diamond interchange, Huntsville, AL: UAH Research Report.
ATS/American, n.d. The Official Website of the DDI - "A Diamond Interchange With a Twist". Available from Internet: http://www.divergingdiamond.com/benefits.html.
Bared, J.G.; Edara, P.K.; Jagannathan, R. 2005. Design and Operational Performance of Double Crossover Intersection and Diverging Diamond Interchange, Transportation Research Record: Journal of the Transportation Research Board, 1912: 31-38.
Chilukuri, V.; Siromaskul, S.; Trueblood, M.; Ryan, T. 2011. Diverging diamond interchange performance evaluation (I-44 & Route 13). Available from Internet: http://library.modot.mo.gov/RDT/reports/TRyy1013/or11012.pdf.
Chlewicki, G. 2003. New Interchange and Intersection Designs: The Synchronized Split-Phasing Intersection and the Diverging Diamond Interchange. Anaheim, California, 2nd Urban Street Symposium.
Chlewicki, G. 2011. Should the diverging diamond interchange always be considered a diamond interchange form?, Transportation Research Record: Journal of the Transportation Research Board, 2223: 88-95.
Hughes, W.; Jagannathan, R. 2009. Double Crossover Diamond Interchange. Available from Internet: http://www.fhwa.dot.gov/publications/research/safety/09054/09054.pdf.
Husch, D.; Albeck, J. 2006. Synchro Studio 7. s.l.:Trafficware.
Jones, S.L.; Sullivan, A.J.; Cheekoti, N. 2004. Traffic Simulation Software. Available from Internet: http://utca.eng.ua.edu/files/2011/08/02217fnl.pdf.
Sharma, S.; Chatterjee, I. 2007. Performance Evaluation of the Diverging Diamond Interchange in Comparison with the Conventional Diamond Interchange. Iowa State University, Ames, Transportation Scholars Conference.
Technology, F. O. o. S. R. D. a. 2013. Drivers’ Evaluation of the Diverging Diamond Interchange. Available from Internet: https://www.fhwa.dot.gov/publications/research/safety/07048/07048.pdf.
Transportation, M.D.o. 2010. Missouri's Experience with a Diverging diamond interchange - Lessons Learned. Available from Internet: http://library.modot.mo.gov/RDT/reports/UnNumbrd/or10021.pdf.
Wolf, S. 2009. Diverging Diamond Interchange 101. Available from Internet: http://transportation.ky.gov/us-68-double-crossover-diamond/documents/fhwa_ddi_101_8-9-09.pdf.
Xu, H.; Liu, H.; Tian, Z.; Zhang, W. 2011. Control delay calculation at diverging diamond interchanges, Transportation Research Record: Journal of the Transportation Research Board, 2257: 121-130.
Quoted IJTTE Works
There is no quoted studies.
Related Keywords