HSIS Summary Report
David L. Harkey, Herman Huang, and Charles V. Zegeer
Aug-96
This study compared freeway crashes that involved older drivers (ages 66 and older) with those that involved middle-aged drives (ages 31 through 45). Data from five HSIS states - Illinois, Maine, Michigan, Minnesota, and Utah - were used. A total of 40,297 crashes were used in the analysis: 36,142 crashes for drivers ages 31 to 45, and 4,155 crashes for drivers age 66 and older. To help control for the lack of exposure data, "paired-vehicle" analyses were performed for the 2,516 crashes that involved one older and one younger driver. Compared to their younger counterparts, older drivers were more likely to be changing lanes, were five times as likely to be cited for failure to yield while changing lanes, and were over-involved in run-off-road, single-vehicle crashes. Older drivers were also more likely to be injured or killed in freeway crashes.
Analysis of Older Drivers On Freeways
Older drivers
Freeways
Crash type
Maneuvers
HSIS
HSIS Summary Reports are two to eight pages in length and include a brief description of the issue addressed, data used, methodology applied, significant results, and practical implications.
A variety of research studies have been performed using data from HSIS. Many of the final reports prepared are now available electronically.
Research reports are often summarized in executive summaries, technical briefs, or other abbreviated formats. Included here are those road safety summaries that involved research using HSIS data.
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HSIS data are sometimes used in research studies that result in other types of finished products, such as dissertations, theses, and conference proceedings.
