00821087

Component

http://www.sciencedirect....bbfccc15f1166850b4e35ed09e

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.

English

p. 65-71

2002-1

Transportation Research Part D: Transport and Environment

Figures (1) ; References; Tables (3)

Air quality management; Arterial highways; Before and after studies; Carbon monoxide; Case studies; Fuel consumption; Nitrogen oxides; Roundabouts; Signalized intersections; Traffic safety; Unsignalized intersections

Sweden

Energy; Highways

TRIS, ATRI

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