The effect of diagrammatic signing at head speed interchanges; final report, by Frank D. Shepard.
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

For very narrow results

When looking for a specific result

Best used for discovery & interchangable words

Recommended to be used in conjunction with other fields



Document Data
Clear All
Clear All

For additional assistance using the Custom Query please check out our Help Page


The effect of diagrammatic signing at head speed interchanges; final report, by Frank D. Shepard.

Filetype[PDF-2.49 MB]



  • Creators:
  • Corporate Creators:
  • Publication/ Report Number:
  • Resource Type:
  • Geographical Coverage:
  • OCLC Number:
  • Corporate Publisher:
  • Abstract:
    Improvements in highway guide signing at interchange areas are needed to reduce driver confusion and the accidents that result from it. One possible means of improving traffic operations within interchange areas is through the use of diagrammatic signs that give a graphic representation of the highway or interchange ahead. This study consisted of a laboratory investigation of the effect of diagrammatic signs at three interstate interchanges, and a field study of one of these. The results of the study revealed several considerations which should be of benefit in the design and evaluation of diagrammatic signing. First, through the use of a laboratory procedure utilizing motion picture segments to simulate actual roadway conditions, diagrammatic signs, rather than the existing conventional signs, were recommended for the three sites studied. The field study, however, indicated that the new diagrammatic sign observed in the field did not significantly reduce the number of erratic maneuvers. Although there were certain limitations placed on this study resulting from an abbreviated field phase, the study does propagate an awareness of the many variables which could influence results found from either laboratory or field studies.
  • Format:
  • Collection(s):
  • Main Document Checksum:
  • Download URL:
  • File Type:

Supporting Files

  • No Additional Files
More +

You May Also Like

Checkout today's featured content at