Observations of daytime motorcycle headlamp use were made in the same cities as observations of helmet use. In cities with such laws - Atlanta and Chicago - "headlamps were in use by 87% and 98% respectively" of the observed motorcycles, while in the cities without such laws, 51% were using headlamps in Los Angeles and only 43% in Baltimore. To evaluate the effectiveness of daytime headlamp use laws, the study compared the fatal crash involvement rates in four states (Georgia, Illinois, New York, and North Carolina) that enacted such laws with states (Florida, Iowa, Pennsylvania, and Virginia) without headlamp laws during the same period. Since most of the laws were only recently enacted, data were available for "only slightly more than a year after the laws' effective dates in two of the four states," and there were fewer states available for comparison, than were available for the helmet law comparison. The study found that, in the year following enactment of daytime headlamp use laws, "the proportion of fatal crashes involving motorcycles decreased from that of the prior year in each of the states enacting such laws relative to the total such fatalities in it and its comparison state." The conclusion that daytime headlamp use laws were responsible for these reductions in fatalities "must be tempered by consideration of the possibility that the states changing headlamp laws were not sufficiently comparable to the available comparison states," the study cautioned. The findings are, however, "sufficiently encouraging to justify their consideration in states that do not now have headlamp use laws."

  • Corporate Authors:

    National Safety Council, Safety Research Info Serv

    425 North Michigan Avenue
    Chicago, IL  United States  60611
  • Authors:
    • Robertson, L S
  • Publication Date: 1975-11

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 20 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00131992
  • Record Type: Publication
  • Source Agency: National Safety Council Safety Research Info Serv
  • Files: TRIS
  • Created Date: Jun 5 1976 12:00AM