ERRORS IN NOISE LEVEL ESTIMATES AS A RESULT OF INACCURATE TRAFFIC INPUT DATA

FOUTEN IN GELUIDNIVEAUSCHATTINGEN TEN GEVOLGE VAN ONNAUWKEURIGHEDEN IN DE VERKEERSGEGEVENS

The Dutch noise abatement law enforces strict noise standards and prescribes a very sophisticated numerical procedure for estimating noise levels. In case standards are not met adequate measures have to be taken. Very little attention has been paid to the precision of the traffic input data required by the procedure. In this memorandum the author investigates the accuracy of these data and analyses the effect of the input data errors upon the accuracy of the computed noise levels. To this end an error propagation analysis has been carried out for urban roads. The author found that average errors of noise levels are considerable and range from 2db (a) on high volume roads to nearly 5db (a) on lower volume roads. Due to various assumptions made these values must be regarded as minimum estimates. Implications of these errors for planning as well as for the traffic models, which have to provide the necessary traffic data, are described. (Author/TRRL)

• Corporate Authors:

  Delft University of Technology

  Instituut Voor Stedebauwkunding Onderzoek, 1 Berlangeweg
  2208 Delft,   Netherlands 
• Authors:
  • Jansen, GRM
• Publication Date: 1983-8

Language

• Dutch

Media Info

• Features: Figures; References; Tables;
• Pagination: 33 p.
• Serial:
  • Issue Number: 26

Subject/Index Terms

• TRT Terms: Accuracy; Calculation; Data collection; Data files; Errors; Estimates; Forecasting; Legislation; Planning; Prevention; Sound; Sound level; Traffic surveillance
• Uncontrolled Terms: Input data
• Geographic Terms: Netherlands
• ITRD Terms: 6464: Calculation; 6440: Error; 132: Forecast; 8634: Input data; 1556: Legislation; 8078: Netherlands; 143: Planning; 9149: Prevention; 6748: Sound; 6747: Sound level
• Subject Areas: Highways; Law; Operations and Traffic Management; Planning and Forecasting; Security and Emergencies;

Filing Info

• Accession Number: 00392676
• Record Type: Publication
• Source Agency: Institute for Road Safety Research, SWOV
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS
• Created Date: Mar 29 1985 12:00AM