Temporary Pavement Markings Placement and Removal Practices in Work Zones (2021) / Chapter Skim
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5 Introduction Background To navigate safely through work zones, drivers must follow a path through various work zone con gurations such as lane changes, alignment shi s, and crossovers. e use of temporary pavement markings in work zones helps delineate the vehicle path of travel and direct drivers safely through the work zone.
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6 Temporary Pavement Markings Placement and Removal Practices in Work Zones • Processes for monitoring, inspection, enforcement, and quality assurance of temporary pavement markings in work zones; • Contract basis of payment for maintenance of temporary pavement markings during construction (e.g., lump sum or itemized per application) ; and • Innovative DOT practices for temporary pavement markings in work zones.
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Introduction 7 • Temporary raised pavement markers (TRPMs) , also known as temporary pavement markers (TPMs)
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8 Temporary Pavement Markings Placement and Removal Practices in Work Zones Materials Application Durability Pros Cons Paint Machine 1 year or less Low cost ($0.10– 0.15/ft) ; wet-reflective elements can be added Low durability under heavy traffic; low quality under wet weather.
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Introduction 9 • Sandblasting (Figure 5) shoots very ne materials at a fast rate to remove the pavement markings.
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10 Temporary Pavement Markings Placement and Removal Practices in Work Zones Source: KC Power Clean 2015 Figure 5. Example of sandblasting.
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Introduction 11 • Chemical (Figure 9) involves the application of paint strippers in liquid or gel form followed by rinsing with a simple water jet.
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12 Temporary Pavement Markings Placement and Removal Practices in Work Zones Source: Stanley Paving n.d. Figure 10.
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Introduction 13 Additional information regarding the various methods from a previous study, including pros and cons, is shown in Table 3. As shown in the table, grinding is fast and inexpensive but leads to pavement scarring.
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14 Temporary Pavement Markings Placement and Removal Practices in Work Zones Removal Type Marking MarkingSize Cost per Linear Foot Chemicals Concrete Water-Based 12 mils $0.33 Concrete Solvent-Based 20 mils $0.41 Asphalt Water-Based 20 mils $0.83 Asphalt Solvent-Based 12 mils $0.48 Water Blasting Concrete Water-Based 20 mils $2.14 Concrete Solvent-Based 12 mils $4.39 Asphalt Water-Based 12 mils $0.58 Asphalt Solvent-Based 20 mils $5.86 Asphalt Tape 4 in. $0.09 Dry Ice Blasting Concrete Water-Based 12 mils $3.37 Concrete Solvent-Based 20 mils $26.00 Concrete Tape 4 in.
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Introduction 15 Synthesis Methodology e synthesis approach included a literature review, survey, and case examples. e existing literature from many di erent sources -- including guides and research reports as well as DOT policies, standards, and speci cations -- was reviewed and synthesized.
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