Pavement Marking Warranty Specifications (2010) / Chapter Skim
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Pages 17-38
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From page 17... ...
The pavement marking materials that are listed for Idaho in Table 2 are those that have already been used by contractors working under these performance specifications -- they are not proposed or required in the specifications themselves. The Indiana DOT, which now applies a Materials and Workmanship warranty to pavement markings, reported that they are considering a performance specification.
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From page 18... ...
Arkansas Option 1: Inverted profile thermoplastic Option 2: High-performance marking tape (or, for center and skip lines on portland cement concrete pavements, high-performance contrast marking tape) 4 years 4 years Longitudinal markings only British Columbia Paint with glass beads Calendarbased following application Longitudinal markings only Delaware Retroreflective preformed patterned pavement marking 1-year performance period + 4-year warranty Longitudinal markings 1-year performance period + 2-year warranty Symbols and legends Idaho Performance of recessed durable pavement markings Materials submitted to date under the 2-year performance specification include polyurea, epoxy, and Hi-Build Waterborne paint 2 years Longitudinal markings only, including curves and tapers, edge lines, skip lines, centerlines, interchange gore lines, intersection channeling, and bicycle lane lines Performance of recessed durable pavement markings Materials submitted to date under the 4-year performance specification include inlaid highperformance tape and MMA 4 years Same as above TABLE 2 CHARACTERISTICS OF EXAMPLE WARRANTIES IN APPENDIX D (continued on next page)
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Illinois Thermoplastic, paint, preformed plastic, epoxy, preformed thermoplastic, and compatible glass beads 180 days through a winter Longitudinal and transverse markings, words, and symbols Indiana Durable pavement marking materials: Thermoplastic, preformed plastic, and epoxy 180 days through a winter Longitudinal, transverse, and intersection markings Maryland Inlaid pavement striping tape 180-day observation Longitudinal markings only period + 5-yr warranty period Missouri Retroreflective pavement marking tape Performance of durable permanent pavement markings 4 years 4 years Longitudinal markings only Mainline and ramp markings, mainline turn lanes, and crossovers and signalized intersections on the mainline (i.e., all long-line markings within and approaching an intersection, but excluding any markings on the side street approaches, and excluding intersection markings such as stop bars, turn arrows, and hash marks) TABLE 2 (continued)
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• Initial quality control is important in reducing risk under a performance-based warranty. Crediting a very capable inspection staff at work during application of pavement markings, the Delaware DOT noted a history of very few failures.
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Forty-six percent perceived a small increase in lifecycle costs. Again, these outside survey data applied to road construction warranties generally, not necessarily to pavement marking projects.
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Discoloration or Pigment Loss Color Contrast and Stability Color Reflectance Color White and Yellow Retroreflectivity Durability, Presence, Adhesion Percent of Respondents Using Warranties FIGURE 8 Warranty criteria for technical acceptability of pavement markings.
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From page 23... ...
A few agencies responded with more than one method, explaining that different parties might be involved at different points during the life of the pavement markings. There is little unanimity among agencies in the frequency of performance inspections for warranties.
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Another agency, which has a 180-day warranty period through the winter season, indicated that it may consider, on a case-bybase basis, a contractor's request to apply temporary markings in the Fall, following up with the specified markings in the Spring. Inspections by Agency Personnel Only Inspections by Agency with Contractor Participation Inspection by Contractor Inspection by Third Party Other Inspection Approach 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Percent of Respondents Using Warranties FIGURE 10 Responsibility for inspection of pavement markings under warranty.
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The North Dakota DOT used a warranty specification for epoxy paint pavement markings from 2002 to 2005. This performance specification required the contractor to achieve specified minimum retroreflectivity levels initially (following construction)
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The Missouri DOT performance specification illustrates payment adjustments based on the performance of individual 1.0-mile segments covered by the contract. If more than 10% of pavement markings are failed in any one evalu26 ation period, the contractor is regarded as in default and required to submit for Missouri DOT approval a remedial plan to correct these failures.
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From page 27... ...
Examples of items discussed at these meetings are as follows: • Arkansas noted that every item in the specification was thoroughly discussed over a long period of time. Some agencies focused explicitly on technical requirements; for example, the mil thickness and pounds of glass beads per gallon of paint (Delaware)
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• Issue: Potential interactions between a new 5-year pavement marking warranty with bond and an existing 28 asphalt pavement performance bond, also for 5 years. Problems may include contractor bonding capacity and conflicts between respective warranty requirements for pavements versus pavement markings.
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• Those agencies that characterized their experience with pavement marking warranties as having "Mixed Results" were asked to identify both the perceived motivations/ benefits and the perceived impediments/risks/drawbacks of warranty use. • Those agencies that have not used pavement marking warranties but are potentially interested in their application were asked to identify what types of information would be most helpful in their future consideration.
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• Another agency reported that it was moving toward performance-based specifications and had considered warranties, even trying them in one case. However, agency field personnel had had significant experience in applying pavement markings themselves.
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PERSPECTIVES OF PRIVATE INDUSTRY Overview Telephone interviews were held with seven pavement marking contractors and two marking materials manufacturers to obtain private sector perspectives on pavement marking warranties. These entities are identified in Appendix C
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From page 32... ...
to serve as a general contractor where allowed and appropriate on pavement marking projects. General Positions on Warranties All interviewed firms believed in providing a quality pavement marking job, and their comments supported the notion that quality-oriented firms perform their projects to the same high standards and levels of commitment regardless of whether or not the projects involve a warranty.
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Products include durable pavement marking materials: epoxy, polyurea, uret hane, and -- for warranty work -- a speci alized multi-polymer based on prem ium raw materials. RPM = raised pavement markers, MMA = methyl methacrylate.
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Performance requirements need to be looked at in the context of site conditions, as mentioned earlier. The presence of heavy truck traffic, a need for tight turning maneuvers by these heavy vehicles, or other causes of encroachment that would shear the pavement markings all increase risk (Company M1)
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. Comments based on the contractor's experience in developing the airfield pavement markings handbook echoed opinions of highway practitioners; for example, the importance of minimum retroreflectivity values at installation and during the expected service life, a belief that good specifications with enforceable requirements leads to a better pavement marking product, and the desirability of moving toward performance specifications and certification programs.
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Good planning, work execution, and keeping on top of things help ensure that the pavement marking product performs well. Both vendors manufacture premium pavement marking materials having standard 4-year warranties, with variations possible case-by-case.
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• Engage contractors more in the pavement marking program; for example, consider their potential to perform the data collection needed to monitor the warranty. If desired, the data could also be posted on an agency's web system for network-level review and assessment, becoming a part of an agency's overall asset management (Company M1, Contractor A)
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From page 38... ...
pavement marking test facility. The paper considered the implications of an accelerated testing turntable for pavement markings, raising the following issues ("Pavement Marking Material .
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