United States Pavement Markings - FHWA MUTCD
Traffic control devices for deterring wrong-way driving: Historical evolution and current practice - ScienceDirect
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Figure 3B-15 Long Description, Sheet 1 of 2 - MUTCD 2009 Edition - FHWA
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Reptile Care — Lick Your Eyeballs
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Resources Safeway Sign Company
Traffic control devices for deterring wrong-way driving: Historical evolution and current practice - ScienceDirect
Roadway Markings
United States Pavement Markings: Work Zone Pavement Markings Long Descriptions - FHWA MUTCD