Long term striping alternatives for bridge decks : executive summary report.
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2009-01-01
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Edition:Executive summary report.
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Abstract:ODOT uses a number of pavement marking ; materials including waterborne and alkyd traffic paint, ; polyester, thermoplastic, preformed tapes, epoxy, and ; heat-fused preformed thermoplastic; which are ; addressed in ODOT Construction and Material ; Specifications (C&MS) Items 640 and 740. Material ; selection is presented in Table 397-1 of the 2002 Traffic ; Engineering Manual (TEM), whereby the material type ; is chosen according to the remaining life of the ; pavement surface, type of line (longitudinal line or ; auxiliary), type of pavement surface (asphalt or ; concrete), and average daily traffic (ADT). According to ; this table, durable markings such as thermoplastic and ; epoxy are more likely to be applied on highways with ; high traffic volumes and pavements with a remaining ; surface life in excess of four years, while non-durable ; markings such as traffic paint and polyester are ; recommended for restriping. Furthermore, thermoplastic ; markings are specified for new asphalt pavements and ; epoxy markings are specified for new concrete ; pavements. This constraint, however, has significant ; financial impacts on projects that include concrete ; bridge decks connected to mainline asphalt pavements. ; The additional cost in such projects is resulted from ; paying the contractor an extra cost to use thermoplastic ; for the asphalt portion and epoxy for the concrete ; portion, or from dividing the project into two separate ; projects; one for the asphalt and another for the concrete. ; Due to these financial concerns, thermoplastic, ; which has poor durability on concrete surfaces, is ; currently being applied onto the concrete bridge decks as ; well as the mainline asphalt pavements. This often ; results in premature debonding in the bridge stripes ; compared to those on the adjoining asphalt pavement. ; This deficiency raises major safety concerns ; regarding these bridges, and leads to low ; performance ratings as measured using various ; performance indicators in force by ODOT. ; As a result, ODOT invited the pavement ; marking industry to provide alternative marking ; materials and/or installation techniques to be ; tested on Portland cement concrete bridge decks ; along interstate I-71 in District 3; and initiated ; this project to evaluate the performance of the ; proposed materials.
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Main Document Checksum:urn:sha256:996fe11a59b146f1aad151240c0bca226fc5a4cac56b881e8cfbed0d6142f6db