Warm Mix Asphalt - Aapaq.org

The basic method for measuring preventivemaintenance performance is to determinethe ratio between the percent of totalmaintenance budget a jurisdictionactually spends on preventive maintenanceversus how much is recommendedthey spend according to their pavementmanagement software.Because the recommended percentof budget comes directly from eachjurisdiction's pavement managementdatabase, it will vary depending onindividual network characteristics. Jurisdictionswith very a high network PCI will havea higher percent of budget recommendationfor preventive maintenanceand those with a very low PCI will havea lower percent of budget recommendation.Since the recommended amount of preventivemaintenance is expressed as a percentage,jurisdictions are not rewarded or penalizedbased on the size of their jurisdictions,the current condition of their pavementsor the size of their maintenance budgets.PotholeAs shown in Table 1, the recommended percentof budget for preventive maintenancefigure is generated by each jurisdiction'spavement management systemonce an "unconstrained budget needs"(needs are not constrained to available funds)model is run .»>Calculating Performance ScoresMTC has always defined preventive maintenanceas any maintenance treatment appliedto a street that has a PCI of 70 or above.Research has shown that the life extension valueof lower cost maintenance treatmentsis greatest while the pavement isstill in good condition. While it can begenerally said that any pavement with a PCIof 70 or above is in "good" conditionand will respond well to preventive maintenance,there is a gray area for some roadwayswithin the 60 to 70 PCI range,as to whether or not they can also garnerthe same life extension from lower costtreatments as those that are above 70.This is especially true in the caseof residential streets and low traffic rural roadwaysthat suffer mainly from" non-load"related distresses. For this reason, jurisdictionswere allowed preventive maintenance "credit"for treatments applied to arterialand collector roadways with a PCI of 70or above, and residential/local roadwayswith a PCI of 60 and above.Needs - Projected PCI/Cost SummaryYearPCITreatedPCIUntreated2009 85 742010 85 722011 86 712012 85 692013 85 682014 86 662015 85 642016 87 632017 86 61Cost$4,277,053$1,209,706$1,012,909$539,588$666,291$940,687$447,497$1,011 ,878$277,5852018 85 59$183,698PM Cost $2,744,440 Total Cost $10,566,893e M2~MTC StreetSaver®Table 110-Year Needs Analysis with Preventive Maintenance Recommendation0europeanroads review 1 B • Spring 2011 • RGRA ED