Publication Number: FHWA-HRT-11-024
Date: April 2011
Safety Evaluation of the Safety Edge Treatment
Chapter 8. Recommendations
The following recommendations can be made based on the
results of the research presented in this report:
The safety edge treatment is suitable for use by
highway agencies under a broad range of conditions on two-lane highways. While
the evaluation results for total crashes were not statistically significant,
there is no indication that the effect of the safety edge treatment on total
crashes is other than positive.
That the overall
effectiveness of the safety edge treatment found in this study was not statistically significant is not surprising given
that the magnitude of that safety effect appears to be small (i.e., approximately 5.7 percent). However, the safety
edge treatment is so inexpensive that its application under most
conditions appears to be highly cost-effective. The effect of the safety edge treatment would be cost-effective for two-lane
highways with traffic volumes over 1,000 vehicles per day even if its
effectiveness were 2 percent rather than 5.7 percent.
cost-effectiveness of the safety edge treatment increases with increasing
traffic volumes. For roads with higher traffic volumes, the safety edge
treatment is highly cost-effective.
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