Technical Summary
FHWA
May-09
This is a technical summary of the Federal Highway Administration (FHWA) report with the same title, FHWA-HRT-09-031. The safety effectiveness of various lane-shoulder width combinations for a fixed paved width is explored empirically in this study to provide better support to the States when selecting a lane-shoulder combination for a given paved width on rural, two-lane, undivided roads.
Safety Evaluation of Lane and Shoulder Width Combinations on Rural, Two-Lane, Undivided Roads
safety
lane width
shoulder width
crash modification factor
geometric design
two-lane
case-control
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.
