Field experimental study of traffic-induced turbulence on highways

A. Alonso-Estébanez, P. Pascual-Muñoz, C. Yagüe, R. Laina, D. Castro-Fresno

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Abstract

This paper is focused on traffic-induced turbulence (TIT) analysis from a field campaign performed in 2011, using ultrasonic anemometers deployed in the M-12 Highways, Madrid (Spain). The study attempts to improve knowledge about the influence of traffic-related parameters on turbulence. Linear relationships between vehicle speed and turbulent kinetic energy (TKE) values are found with coefficients of determination (R2) of 0.75 and 0.55 for the lorry and van respectively. The vehicle-induced fluctuations in the wind components (u′, v′ and w′) showed the highest values for the longitudinal component (v) because of the wake-passing effect. In the analysis of wake produced by moving vehicles it is indicated how the turbulence dissipates in relation to a distance d and height h. The TKE values were found to be higher at the measuring points closer to the surface during the wake analysis.

Highlights
► Linear models between vehicle speed and TKE values are found for the lorry and van. ► The lorry induces higher TKE values than the van or the car. ► The longitudinal component exhibits the highest values of turbulence intensity. ► An increase of distance, d will diminish the TKE values. ► An increase of height, h will diminish the TKE values.
Original languageEnglish
Pages (from-to)189-196
Number of pages8
JournalAtmospheric Environment
Volume61
Early online date25 Jul 2012
DOIs
Publication statusPublished - Dec 2012

Keywords

  • Vehicle-induced turbulence
  • Parameterization
  • Highway turbulence
  • Turbulence intensity

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