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Title:Evaluating All-Weather Pavement Markings in Illinois: Volume 1
Author(s):Hawkins, Neal R.; Pike, Adam M.; Smadi, Omar G.; Knickerbocker, S.; Carlson, Paul J.
pavement markings
wet retroreflectivity
field evaluation
laboratory evaluation
continuous wetting
Geographic Coverage:Illinois
Abstract:Pavement markings provide critical guidance to motorists, especially under dark (non-lighted) conditions. However, the ability to see these pavement markings on a wet, rainy night is problematic given that the presence of water considerably decreases pavement marking retroreflectivity. This project evaluated the performance of several allweather pavement marking products in an effort to provide guidance on their use on Illinois Department of Transportation (IDOT) roadways. In addition, a laboratory evaluation was completed in an effort to simulate degradation mechanisms of these pavement markings so that future all-weather materials can be evaluated in a timely manner within the lab versus public roadway. The study found that only 15% of the all-weather products provided a retroreflectivity of 50 millicandelas per meter squared per lux (mcd/m²/lux), which is noted as (mcd) within this report, under continuous wetting conditions. The lab evaluation showed some promise for the dry retroreflectivity performance given that data variability was low and there was good correlation initially with the field data. The correlation was not as good, however, as the markings aged, and correlation in the wet conditions was not good.
Issue Date:2015-12
Publisher:Illinois Center for Transportation/Illinois Department of Transportation
Citation Info:Hawkins, , Neal R., Adam M. Pike, Omar G. Smadi, Skylar Knickerbocker, and Paul J. Carlson. 2015. Evaluating All-Weather Pavement Markings in Illinois: Volume 1. A report of the findings of ICT-R27-120. Illinois Center for Transportation Series No. 15-018. Research Report No. FHWA-ICT-15-018. Illinois Center for Transportation, Rantoul, IL.
Series/Report:Illinois Transportation Series No. 15-018; FHWA-ICT-15-028
Genre:Technical Report
Sponsor:Illinois Department of Transportation, R27-120
Rights Information:No restrictions. This document is available through the National Technical Information Service, Springfield, VA 22161.
Date Available in IDEALS:2015-12-09

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