HSIS Summary Report
Yusuf M. Mohamedshah, Li Wan Chen, and Forrest M. Council
May-00
This study examined 4,709 two-vehicle red-light-running (RLR) crashes at four-way intersections in California. Negative binomial models were developed to relate RLR crashes with geometric characteristics. Each one-lane increase in the width of the mainline street resulted in a 7 percent increase in RLR crashes for vehicles on the cross- street. However, the width of the cross-street did not affect the number of RLR crashes for vehicles on the mainline. RLR crashes for vehicles on the mainline street increased with higher ADT on both the mainline and the cross-street. In contrast, RLR crashes for vehicles on the cross-street increased with higher ADT on the cross-street but was unaffected by ADT on the mainline. The number of RLR crashes was 35 to 39 percent higher at intersections with fully-actuated signals than at those with pre-timed signals. These results can be used to target specific intersections for law enforcement measures.
Association of Selected Intersection Factors with Red-Light-Running Crashes
Red-Light-Running Crash
Intersection Characteristics
Crash Rate
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.
In addition to conducting research, HSIS resources are also used to develop products that can be used by practitioners in the analysis of safety problems.
HSIS data are sometimes used in research studies that result in other types of finished products, such as dissertations, theses, and conference proceedings.
