Traffic flow and noise: a method study

Accelerating vehicles emit more noise than vehicles with constant speed and they are a major source of noise pollution in cities, especially near intersections where the driving pattern of a vehicle is likely to change. It is investigated whether there is a difference in noise emission at selected and significantly different roundabouts and intersections. The two road designs that have been investigated in the present study are the conversion of a crossing into a roundabout and the enlargement of an already existing small roundabout. In both cases the noise level at two different positions along the road has been predicted using the Nord2000 model before and after the change in their design. It was possible to predict a change in the noise level due to the change in the road layout and the resulting changed traffic conditions. These predictions are supported by in-situ measures. The measurements that were carried out in the crossing to roundabout conversion showed a decrease in noise level in the selected positions of up to 3.7 decibels, and in the enlarged roundabout the noise level increased slightly. There is a fairly good agreement between the measured and modelled levels. Part of this difference can be explained by a different age and type of pavement before and after the reconstruction, rather than caused by the changed layout. Suggestions are made to further improve the measurement as well as the prediction methods.

Language

  • English

Media Info

  • Pagination: 28p
  • Serial:
    • Issue Number: 180

Subject/Index Terms

Filing Info

  • Accession Number: 01383411
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 9788792094636
  • Files: ATRI
  • Created Date: Aug 22 2012 2:09PM