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Title	THE EFFECTS OF SMALL ROUNDABOUTS ON EMISSIONS AND FUEL CONSUMPTION: A CASE STUDY
Accession No	00821087
Authors	VARHELYI, A
Journal Title	Transportation Research Part D: Transport and Environment Vol. 7 No. 1
Corp. Authors / Publisher	Elsevier
Publication Date	20020100
Description	p. 65-71; Figures(1); References; Tables(3)
Languages	English
Abstract	Intersections on arterials were rebuilt as small roundabouts in a Swedish town with the goal of improving traffic safety. One of the intersections was originally signalized while others were yield-regulated. To measure CO and NOx emissions and fuel consumption before and after the roundabouts were installed, random cars were selected and followed with an instrument-equipped vehicle that tried to imitate the followed car's driving pattern as closely as possible. Results of the study found that CO emissions decreased by 29%, NOx emissions decreased by 21% and fuel consumption by 28% at the roundabout that replaced the signalized junction. At roundabouts replacing yield regulated junctions, CO emissions increased by 4%, NOx emissions by 6% and fuel consumption by 3%. These results indicated that the larger reductions in emissions and fuel consumption at one former signalized intersection can compensate for the increase produced by several yield-regulated junctions rebuilt as roundabouts.
TRT Terms	Air quality management ; Arterial highways ; Before and after studies ; Carbon monoxide ; Case studies ; Fuel consumption ; Nitrogen oxides ; Roundabouts ; Signalized intersections ; Traffic safety ; Unsignalized intersections
Geographical Terms	Sweden
Subject Areas	Energy; Highways
Availability	Elsevier Science, Incorporated Order Document: http://www.sciencedirect.com/science/journal/13619209 Find a library where document is available Order Document: http://worldcat.org/issn/13619209
URLs	Document: http://www.sciencedirect.com/science/article/B6VH8-4465FJ5-4/2/5990b9bbfccc15f1166850b4e35ed09e
TRIS Files	HRIS
Database	TRIS Online