This report is the annual continuing study of speeds of vehicles on rural Indiana Highways. Observations of spot speeds were taken on interstate, four-lane, and two-lane highways throughout the state during the months of June, July, August and September 1974. Analysis of the speeds showed the overall average speed for passenger cars was 57.80 miles per hour. The overall average speed for heavy trucks was 55.14 miles per hour. This was a reduction of 7.4 miles per hour for the overall average speed for passenger cars and a reduction of 3.6 miles per hour for heavy trucks as compared to data collected at the same locations in 1973. There will not be any attempt to perform simple linear regression analysis in this year's report because the results of 1974 are significantly different from those of previous years.

  • Supplemental Notes:
    • This report was prepared in cooperation with the Indiana State Highway Commission.
  • Corporate Authors:

    Purdue University/Indiana Department of Transportation JHRP

    Purdue University, School of Civil Engineering
    West Lafayette, IN  United States  47907-1284
  • Authors:
    • Gadallah, A A
    • Borg, T M
  • Publication Date: 1974-11-13

Media Info

  • Features: Appendices; Figures; Tables;
  • Pagination: 28 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00098535
  • Record Type: Publication
  • Report/Paper Numbers: Intrm Rpt.
  • Files: TRIS
  • Created Date: Aug 27 1975 12:00AM