COMPARISON OF AUTOMOBILE EMISSIONS BASED ON TRIP TYPE IN TWO METROPOLITAN AREAS

Estimates of the distribution of automobile emissions among various trip types in the Washington, D.C. area are developed and compared with analogous estimates previously reported for Allegheny County, Pennsylvaina. Work trips produce approximately equal proportions of emissions in both regions. However, trips to and from the central area and short trips are of considerably lesser importance in Washington than in Allegheny county. In addition, cold starts and evaporations produce a smaller proportion of emissions in the Washington area than in Allegheny County. These results suggest several ways in which measures that are effective in reducing automobile emissions in Washington are likely to differ from measures that are effective in achieving the same objective in Allegheny County. For example, improved suburban transit service and disincentives to suburban automobile travel are likely to be of greater importance in the Washington area than in Allegheny County. Jitney service or other measures oriented toward short trips may be of greater value in Allegheny County. In both regions, however, control of emissions from trips with one or both ends in the suburbs is necessary to achieve substantial reductions in regional automobile emissions.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 13-21
  • Monograph Title: Transportation environmental review process
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00141272
  • Record Type: Publication
  • ISBN: 0309024943
  • Files: TRIS, TRB
  • Created Date: Oct 26 1981 12:00AM