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Appendix D - Supplemental References
Pages 98-99

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From page 98...
... This report looks at the impacts of flashing LED signs and optical speed bars at intersections and road segments identified as "unsafe." Initial results found limited statistically significant speed reduction. Researchers recommend that both flashing LED stop signs and optical speed bars be considered as safety countermeasures at appropriate locations where higher than expected numbers of crashes, crash rates, or excessive speeding occur.
From page 99...
... This research project examined whether perceptual countermeasures such as pavement marking patterns have the potential to reduce vehicle speeds. The markings resulted in a decrease in overall vehicle speeds.


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