A series of tests to analyse exposure to air pollution in various traffic conditions in central and urban districts (Gothenburg) has been made. The air has been analysed with regard to certain components in vehicle exhaust fumes. The components concerned were benzene, alkylbenzenes and n-alkanes. Comparisons of concentration levels of these pollutants on trams on a major road at peak and low traffic showed up to 4 times higher concentrations at rush hour times. On tram routes of little traffic and interspersed long stretches of no traffic a result of 5-6 times lower concentrations was found in comparison to routes of dense traffic. Tests carried out on all three transport mediums simultaneously for the same route, including traffic queues, showed that benzene and alkylbenzenes reached levels of up to 4 times higher in cars than in the other two types of transport. Samples taken from a tram stop where other traffic is fairly limited in the city centre and samples from a tram stop where other traffic is close and concentrated showed a differential factor of 10 in the benzene and alkylbenzene levels. Weather conditions, especially rainfall and wind strength proved to be of major importance for the pollution concentrations. Results showed the importance of the need of measures which must be taken in both the short and long terms. In the short term actions such as avoiding traffic lights which cause traffic queues in the vicinity of tram stops can be taken. If tram doors opened on the side away from other traffic this already has a positive effect. If tramways could be routed to one side of other traffic this would be a great advantage. Another large improvement for the tram driver and his passengers can be achieved by keeping tram routes a whole block away from the busy roads.

  • Corporate Authors:

    Chalmers University of Technology, Sweden

    Institutionen foer Teknisk Kemi, Fack
    S-402 20 Goeteborg 5,   Sweden 
  • Authors:
    • Andersson, A-M
  • Publication Date: 1979


  • Swedish

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 62 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00315149
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Report/Paper Numbers: Monograph
  • Files: ITRD, TRIS
  • Created Date: Sep 16 1981 12:00AM