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The effects of small roundabouts on emissions and fuel consumption: a case study

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Author

Summary, in English

The effects of small roundabouts on emissions and fuel consumption were evaluated using the “car-following” method in a before/after study. The results showed that at a roundabout replacing a signalised junction, CO emissions decreased by 29%, NOx emissions by 21%, and fuel consumption by 28%. At roundabouts, replacing yield regulated junctions, CO emissions increased on average by 4%, NOx emissions by 6%, and fuel consumption by 3%. The results indicate that the large reductions in emissions and fuel consumption at one rebuilt signalised junction can “compensate for” the increase produced by several yield-regulated junctions rebuilt as roundabouts.

Publishing year

2002

Language

English

Pages

65-71

Publication/Series

Transportation Research. Part D: Transport & Environment

Volume

7

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Infrastructure Engineering

Keywords

  • car-following
  • Small roundabouts
  • signalised junction
  • junctions with yield regulation
  • emissions
  • fuel consumption

Status

Published

ISBN/ISSN/Other

  • ISSN: 1361-9209