Effect of reversible lanes on the concentration field of road-traffic-generated fine particulate matter (PM₂.₅)

Fine particulate matter (PM₂.₅) poses a potential threat to human health. The effects on PM₂.₅ before and after implementing a reversible lane were analysed based on a road segment. A simulation experiment was conducted, and the results were verified with normalized and measured concentration data. The PM₂.₅ concentration fields were studied in a series of cases with three different aspect ratios and two wind speeds. The average PM₂.₅ concentrations at y = 0.5, y = 1.5, and y = 2.0 m after the implementation of the reversible lane decreased by 2.35 %, 2.45 %, and 2.70 %, respectively. The effect of implementing a reversible lane on reducing PM₂.₅ concentration was outstanding when the aspect ratio H/W was 2:1, followed by H/W = 1:1 and H/W = 1:2. When the aspect ratio H/W was 2:1 and wind speeds were 1.2 and 3.6 m/s, the average PM₂.₅ concentrations at y = 1.5 m after the implementation of the reversible lane decreased by 84.14 % and 45.45 %, respectively. These findings will assist in designing streets with appropriate aspect ratios, developing an orderly strategy to implement variable lanes throughout an entire road network, and controlling road traffic flows to reduce the potential public harm of PM₂.₅.


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  • Accession Number: 01747306
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 31 2020 3:13PM