A TRAINNOISE-GIS FOR STRATEGIC PLANNING

Commonly the goal of noise mapping is to predict noise levels on a local scale as accurately as possible. This involves taking into account every building and geographic feature in detail. For strategic planning, this procedure shows several shortcomings. Including that much detail makes the job tedious and expensive. Moreover details on new infrastructure may not be known. The indicators used for strategic planning are noise annoyance and exposed population (Lden). This involves locating the population geographically with sufficient accuracy. A detailed land use grid was used to map people to buildings. A GIS (geographic information system) based methodology was developed to solve these problems. Railway tracks were digitised and split up into segments with length between 1 and 5 km. Train traffic on these segments is known and resulting noise emission can be calculated. The GIS is used to retrieve parameters that reflect the presence of barriers, hard and soft ground, closed rows of buildings and dispersed buildings, vegetation and average altitude, These propagation parameters are used to calculate the attenuation (ISO 9613) spatially averaged along the axes of the segment of the railway track and at a specific distance. Using this technique, scenarios for changing traffic or a certain noise policy can easily be evaluated without consulting the GIS, if the infrastructure does not change. Railway segments causing high numbers of annoyed people can be identified. This fast calculating Trainnoise GIS for Strategic Planning is implemented for Flanders, Belgium. (A) For the covering abstract see ITRD E113232.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 1429-32

Subject/Index Terms

Filing Info

  • Accession Number: 00928718
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 9-806554-1-4
  • Files: ITRD
  • Created Date: Aug 2 2002 12:00AM