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Leveraging LiDAR Intensity to Evaluate Roadway Pavement Marking Retroreflectivity
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2024-08-01
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[PDF-8.30 MB]
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Edition:Final Report
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Abstract:Clearly visible lane markings are important for all road users, particularly autonomous vehicles. In general, nighttime retroreflectivity is one of the most challenging marking visibility characteristics for agencies to monitor and maintain, particularly in cold weather climates when agency snowplows remove retroreflective material during winter operations. Traditional surface applied paint and glass beads typically only last one season in climates with routine snowplow activity. Recently, transportation agencies in cold weather climates have begun deploying improved recessed, durable pavement markings that can last several years and have very high retroreflective properties. These recessed durable markings are typically either epoxy, thermoplastic or preformed tape and are typically installed during new construction or significant pavement resurfacing projects. As a result, several dozen installations may occur in a state in any calendar year. This presents a challenge for states that need to program annual re-painting of traditional waterborne paint lines, but not paint over the much more costly durable markings.
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