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FHWA Safety: First graphic from left courtesy of (http://www.pedbikeimages.org/Dan Burden)

References

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  1. Manual on Uniform Traffic Control Devices for Streets and Highways. Federal Highway Administration, United States Department of Transportation, Washington, DC, 2003.
  2. Debaillon, C., P.J. Carlson, Y. He, T. Schnell, and H.G. Hawkins. Review and Development of Recommended Minimum Pavement Marking Retroreflectivity Levels.
  3. Deballion, C., P.J. Carlson, Y. He, and T. Schnell. Updates to Research on Recommended Minimum Levels for Pavement Marking Retroreflectivity to Meet Driver Night Visibility Needs, FHWA- HRT-07-059, FHWA, US DOT, Washington, DC, 2007.
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