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Raised Pavement Markers (RPMs) Assessment Using Highway Speed Mobile Retroreflectivity Technology [Summary]
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2022-05-01
[PDF-291.94 KB]
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Abstract:Raised pavement markers (RPMs) are common on Florida roadways. They improve the visibility of driving lanes under wet or nighttime conditions, especially on rural roads where illumination may be lacking. The effectiveness of RPMs is due to their retroreflectivity, which is the ability to reflect light back toward its source (for example, a driver’s vehicle) regardless of the angle between the light source and the RPM. However, because RPMs are exposed to continuous wear, the elements, and other sources of damage, they may cease to be useful if they are cracked, fragmented, or dislodged. Therefore, RPMs must be inspected, requiring visual inspection along thousands of miles of Florida roadways. Similar inspections are conducted for pavement striping, but these inspections are performed using a mobile reflectivity unit (MRU) that automates the process. It would be useful if the MRU could also be adapted for effective inspection of RPMs.
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