Identifying performance based measures for winter maintenance.
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2013-05-01
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Abstract:One of the Vermont Agency of ; Transportation’s (VTrans) primary missions is to keep Vermont state highways open and safe ; for the transportation network users, while managing the system in a cost ; - ; effective and environmentally sensitive manner. ; Several states have initiated performance m ; easures to ensure public safety, and improve efficiency. VTrans’ Operations Division ; has developed levels of service for winter maintenance in its 2012 Snow and Ice Control Plan. Monitoring and evaluating the ; material usage during the winter months can lea ; d to a substantial increase in cost ; - ; effectiveness. Unfortunately, VTrans does not ; currently have a standard method for rating its maintenance performance during winter maintenance activities. ; An in depth literature search was conducted to determine what winter maintenance performance measure guidelines have ; been established in state highway departments. In addition, state DOT’s were contacted and surveyed regarding the use of ; Winter Maintenanc ; e Performance Measures. The survey was conducted to ensure that newly adopted measures and measures ; used informally would be ; dis ; covered even if they had not appeared in any official plans ; or publications ; yet. ; According to NCHRP 6 ; - ; 17, three factors are commonly incorporated into determining maintenance performance. These ; factors are resources spent (Inputs), accomplishments of work performed (Outputs) and effectiveness of maintenance activities ; (Outcomes). A n ; umber of states have also created a Winter Severity Index of 0 to 100 to ; relate ; performance targets that are ; based on public safety and driver expectations ; better ; . ; A recommendation from this effort is that VTrans incorporate a performance metric that mea ; sures the “time to bare ; pavement conditions.” This method includes recording the time it takes maintenance personnel to achieve bare pavement ; conditions in the wheel paths of the roadway from the time the storm event ends. The use of Global Positioning S ; ystems, and ; other computerized data collection and analysis technology is a means that could promote in effectiveness both in costs and i ; n ; effort over time. The use of these technologies will become more feasible as the automatic vehicle location (AVL) sys ; tems are ; implemented fleet ; - ; wide in Vermont’s snow and ice control vehicles. ; Further research should focus on the relationships between performance metrics and safety. Establishing performance ; measures is the first step in helping to improve and target roa ; dway safety during winter months.
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Main Document Checksum:urn:sha256:3fcb1ce82ce0828dd8ed3c439b93c95510c3738815d8a37557625d7d3bfad704