ANALYSIS OF DIESEL EMISSIONS DUE TO AUTOMOBILES AT SELECTED JUNCTIONS IN THE CITY OF VISAKHAPATNAM - A STATISTICAL APPROACH

This paper presents the results of a statistical analysis of data about diesel vehicle exhaust emissions, mileage, and vehicle age at two major road junctions in the city of Visakhapatnam, India. The data were analysed to: (1) observe the existing trend of exhaust emissions from heavy and medium diesel vehicles; and (2) develop a model correlating the effects of vehicle age and mileage. The smoke density of the emissions was measured, using the free acceleration method with the Hartridge Smoke Meter. Diesel vehicles of different types were stopped, their emissions were measured, and their drivers were interviewed. The statistical analysis included: (1) a correlation technique to estimate the relation between the variables; (2) a linear regression analysis to estimate the effect of the variables; and (3) a chi-square test to compare observed and expected results. Some of the results are tabulated. For all the vehicles, a positive correlation was found between vehicle age and emission value, and a negative correlation between vehicle age and mileage. 85% of the vehicles, passing through the junctions, were found to exceed their speed limit, so that they increased pollution.

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  • Corporate Authors:

    Indian Roads Congress

    Jamnagar House, Shahjahan Road
    New Delhi,   India  110 011
  • Authors:
    • VENKATESWAR, V
    • VEERA BHADRAM, K
    • CHAKRAVARTI, AVS
    • SURESH KUMAR, U
  • Publication Date: 1995-7

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 35-43
  • Serial:
    • Indian Highways
    • Volume: 23
    • Issue Number: 7
    • Publisher: Indian Roads Congress
    • ISSN: 0376-7256

Subject/Index Terms

Filing Info

  • Accession Number: 00715950
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Jan 31 1996 12:00AM