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.
| Title | Pub Date | Author | Report Number |
| Safety Evaluation of Lane and Shoulder Width Combinations on Rural, Two-Lane, Undivided Roads | May-09 | FHWA | FHWA-HRT-09-032 |
| Two Low-Cost Safety Concepts for Two-Way STOP-Controlled, Rural Intersections on High-Speed Two-Lane | Sep-08 | Hughes, W., R. Jagannathan, and F. Gross | FHWA-HRT-08-063 |
| NCHRP Research Results Digest 329: Highway Safety Manual Data Needs Guide | Jun-08 | NCHRP | |
| Safety Evaluation of Center Two-Way Left-Turn Lanes on Two-Lane Roads | Mar-08 | FHWA | FHWA-HRT-08-046 |
| Safety Evaluation of Flashing Beacons at Stop-Controlled Intersections | Mar-08 | FHWA | FHWA-HRT-08-048 |
| Safety Evaluation of STOP AHEAD Pavement Markings | Mar-08 | FHWA | FHWA-HRT-08-045 |
| NCHRP Research Results Digest 318: An Expert System for Recommending Speed Limits in Speed Zones | May-07 | NCHRP | |
| NCHRP Research Results Digest 299: Crash Reduction Factors for Traffic Engineering and Intelligent T | Nov-05 | NCHRP |
When a vehicle leaves the traveled way and encounters a pavement-shoulder drop-off, it can be difficult for the driver to return safely to the roadway. As the driver attempts to steer back onto the pavement, the side of the tire may scrub along the drop-off, resisting the driver's attempts. The safety edge is an innovative treatment intended to minimize drop-off-related crashes.
A road diet involves narrowing or eliminating travel lanes on a roadway to make more room for pedestrians and bicyclists. While there can be more than four travel lanes before treatment, road diets are often conversions of four-lane, undivided roads into three lanes — two through lanes plus a center turn lane. This study resulted in the development of crash modification factors for this engineering treatment.
