Pavement Management Systems: Putting Data to Work (2017) / Chapter Skim
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Pages 27-44
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28 Overview A web-based survey of practice was distributed to pavement management engineers in each of the 52 state transportation agencies (including Puerto Rico and the District of Columbia) and the 10 Canadian provincial MOTs to learn more about current practices in pavement management.
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FIGURE 15 U.S. transportation agencies that responded to the survey.
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30 General Pavement manaGement infOrmatiOn To learn more about the extent to which highway network attributes are incorporated into a pavement management database, respondents were asked to identify whether inventory and condition information exists for various components of the network. Separate questions were posed to U.S.
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31 DOTs have inventory information for their frontage roads, entrance and exit ramps, and shoulders. Even fewer have condition information on that portion of their pavement network.
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32 Some of the responses to the "other" option included • On Interstates, data are collected in one lane in each direction. • In-house staff manually measure distress on samples of the downward imagery.
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33 show that distress values are stored by most agencies along with composite and individual indices such as a rut index or a cracking index. Traffic data and treatment history and cost data are also common in both the United States and Canada.
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34 Performance modeling The first series of questions addressed pavement performance modeling. From a list of options, respondents were asked to select any of the approaches that they have used to predict pavement performance.
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35 Each of the 27 U.S. and six Canadian agencies that reported using customized models were asked a follow-up question intended to identify the factors that are used in developing the models.
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36 recommend specific treatments or both types of treatments.
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37 As noted in the literature review, over the last decade there has been an increased focus on incorporating pavement preservation treatments into a pavement management system. The survey asked respondents to indicate whether their pavement management system includes preservation treatments such as chip seals and microsurfacing on asphalt-surfaced pavements and diamond grinding or dowel-bar retrofit on concrete pavements.
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38 verifying performance models using field data, and developing contractor performance specifications and/or measures to monitor warranty projects. Agencies that selected the "Other" option noted that some of these analyses are performed outside of a pavement management system using other tools.
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39 responses are shown in Figure 32. Only three U.S.
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40 Pavement management Processes, integration, and Documentation Three survey questions were included to learn more about processes to keep the pavement management system current, the amount of integration with other programs, and the types of documentation that exist. The first of these three questions asked respondents to select each of the processes in place to update the agency's pavement management system.
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41 Pavement management information Provided to various Stakeholders As discussed in the literature review, pavement management information is presented in a number of different ways. To learn more about the types of pavement management information that are provided to various stakeholder groups, a list of the different types of information was presented and respondents were asked to identify each stakeholder group that receives that type of information.
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42 FIGURE 38 Number of U.S. agencies providing information to various stakeholder groups.
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43 pavement needs. Agency decision makers receive that information, but also are provided information about candidate projects and how the funding will be used.
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44 • Pavement layer data, mix design properties, and/or material information (six agencies)
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45 In response to the question regarding the processes that are in place to support pavement management (see Figure 35) , 38 agencies reported that they have a process in place to verify the quality of their data.
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