Functional and Economic Evaluations for Choosing Road Intersection Layout
Abstract
The road intersection design requires a choice among different layouts, for example signalized intersections or roundabouts. Generally, layouts which provide higher level of services are the most expensive ones. For this reason, the choice has to consider both fixed and variable costs, the latter consisting in the delays suffered by the drivers crossing the junction. The paper presents a procedure to compare different layouts, taking into account the costs of construction, management/maintenance and delays. The cost of delay is estimated with different traffic conditions, by the evaluation of the layout performance, in terms of delays at the approaches. With the example traffic conditions and parameters values considered in the paper, the compact roundabout turns out to be the layout with the least overall cost. The examples of sensitivity analyses are also provided to understand the cost dependence on the parameters used.References
Transportation Research Board, NCHRP Report 672, Roundabouts: An Informational Guide - Second Edition, Washington, D.C., 2010.
AASHTO, A manual of user benefit analysis of highway and bus transit improvements, Washington, D.C., 1977
Ferrari P., A method for choosing from among alternative transportation projects, European Journal of Operational Research, 150, pp.194-203, 2003
Cantisani, G., Loprencipe, G., Primieri, F. (2012). The integrated design of urban road intersections: A case study. Paper presented at the ICSDC 2011: Integrating Sustainability Practices in the Construction Industry - Proceedings of the International Conference on Sustainable Design and Construction 2011, pp. 722-728, 2012
Papacostas C. S. and Prevedouros, P.D. Transportation engineering and planning, 3rd edition, Prentice Hall, Englewood Cliffs, N.J., 2001
Mauro R., Cattani M., Model to Evaluate Potential Accident Rate at Roundabouts. Journal of Transportation Engineering, 2004, v. 130, n. 5, pp. 602-609.
Troutbeck, R. J. Capacity and Design of Traffic Circles in Australia. In Transportation Research Record: Journal of the Transportation Research Board, No. 1398, Transportation Research Board of the National Academies, Washington, D.C., 1993, pp. 68-74.
Transportation Research Board, Highway Capacity Manual, Fourth Edition, Washington, D.C., 2000.
Lanović Z. Complementarity of traffic flow intersecting method with intersection capacity analysis. Promet Traffic & Transportation Scientific Journal on Traffic and Transportation Research, Vol. 21, No. 4, 2009, pp. 229-238.
Županović D., Anžek M., Kos G. Optimisation of Signal-controlled Intersection Capacity. Promet Traffic & Transportation Scientific Journal on Traffic and Transportation Research, Vol. 22, No. 6, 2010, pp. 419-431.
Cvitanić D., Breš D., Viđak B. Review, testing and validation of capacity and delay models at non-signalized intersections. Promet Traffic & Transportation Scientific Journal on Traffic and Transportation Research, Vol. 19, No. 6, 2007, pp. 71-82.
Tollazzi T., Renčelj M., Turnšek S. New Type of Roundabout: Roundabout with “Depressed” Lanes for Right Turning – “Flower Roundabout”. Promet Traffic & Transportation Scientific Journal on Traffic and Transportation Research, Vol. 23, No. 6, 2011, pp. 359-365.
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