transportation asset management is “an ongoing process of
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Transportation Asset Management is...“an ongoing process of maintaining, upgrading, and operating physical
assets cost effectively, based on a continuous physical inventory and condition assessment” (PA 499, of 2002).
What Destroys A Pavement?• Water–weakensstructure• Traffic–excessiveloadings&volumes• Environment–temperature&oxidation
Pavement Surface Evaluation and Rating (PASER)ThePavementSurfaceEvaluationandRating(PASER)systemisavisualpavementsurveymethodologybasedonthenumber,type,andextentofdistressespresentinapavement.ThePASERscaleis1to10,with10beingbrandnewpavementand1beingtotallyfailed.Ingeneral,pavementswithaPASERof8to10needlittleornomaintenance.PavementswithPASERscoresof5to7needcapitalpreventativemaintenance,andpavementswithPASERscoresof1to4needstructuralimprovement.
Do you use Asset Management every day?
Yes. Most people use asset management every day to manage things like main-tenance on a car, repair and upkeep of a home or even with things as basic as health care. Businesses use asset manage-ment principles extensively.
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http://www.michiganltap.org906-487-2102
Transportation Asset Management for Local Officials
http://www.michiganltap.org
Transportation Asset Management for Local Officialshttp://www.michiganltap.org
906-487-2102
Window of OpportunityIfyouapplyafixtoapavementtooearlyortoolateinthepavement’slife,youarenotlikelytogaintheoptimalbenefitfromthefix.Eachpavementfixhasawindowofopportunityforpreventivemaintenance or structural improvement.
Mix-of-Fixes Approach to PavementsAmixoffixesisapavementmanagementstrategyofapplyingtherightfixattherighttimeintherightplace.Thisapproachmakespreventivemaintenancethepriority,capitalizingonthe“win-dowsofopportunity”fortreatmentwhileusingrehabilitationandreconstructiononlywhenneces-sary.Thegoalistokeepgoodpavementsingoodconditionlonger,thusdelayingtheneedformorecostly rehabilitation and reconstruction projects.
Remaining Service Life (RSL)
Extended Service Life (ESL)
Key Pavement Management Definitions
Critical Distress Point (CDP) – Point when pavement distress changes from needing preventive maintenance to need-ing structural improvement.
Remaining Service Life (RSL) – Time in years from the present to the point when pavement distresses are structural (CDP) and preventive maintenance treatments are no longer cost effective.
Extended Service Life (ESL) – Time in years added to the current RSL based on the type of fix used.
Transportation Asset Management for Local Officials
http://www.michiganltap.org
Structural Improvements
What it is How long it lastsStructural overlay
Anasphaltlayer1.5”to3”thickontopoftheexistingpavementthatbuilds structural strength into the pavement (pavement can be milled prior to placement to remove severe surface imperfections)
5-10years,possiblylonger
Crush and shape
Pulverizedexistingdistressedasphaltsurfacemixedwiththeexistingaggregatebase,thennewhot-mixasphaltsurfaceisplaced
Reconstruction Newroadbyremovingpavementandthebaseand/orsubbase,correct-inggeometricproblems(verticalorhorizontalalignment),upgradingutilities,correctingdrainageproblems,andrebuildingtheroadway(mostexpensiveoption)
Preventive Maintenance Treatments
What it is How long it lastsCrack seal Asphaltsealantthatsealsoutwateranddebris,whichwillfurtherde-
gradethepavement,byfillingdiscretecracksunder¾”wide1-2years
Fog seal Asphaltemulsionsurfacecoatingplacedovernewerpavementstofillhair-linecracksandpreventhardeningtheasphaltbinder
1-2years
Slurry seal Asphaltemulsion,aggregateandportlandcementmixtureappliedtotheroadsurfacetosealpavementfromwateranddebris
3-6years
Microsurfacing Polymer-modified asphalt emulsion, aggregate, and portland cement appliedtotheroadsurfacetosealpavementfromwateranddebris,orused to fill ruts or correct cross slope problems
3-6yearsormore,ifproperly applied
Seal coat (chip seal)
Liquidasphaltemulsionfollowedbyaggregatechipsapplied(insingle,double,ortriplelayer)overanasphaltpavementtocreateawaterproofmembrane,sealingpavementfromwateranddebrisandincreasingsurface friction
3-6years,possiblylonger
Formoreinformationsee:MinnesotaDepartmentofTransportation“BestPracticesHandbookonAsphaltPavementMaintenance”athttp://www.mnltap.umn.edu/publications/handbooks/documents/asphalt.pdf
Transportation Asset Management for Local Officialshttp://www.michiganltap.org
906-487-2102
Michigan Transportation Asset Management Council (TAMC) TheMichiganTransportationAssetManagementCouncil(TAMC)iscomposedofrepresentationfrom:• Localagencies• CountyRoadAssociationofMichigan• MetropolitanPlanningOrganizations• MichiganMunicipalLeague• MichiganAssociationofCounties• MichiganAssociationofRegions• MichiganTownshipsAssociation• MichiganDepartmentofTransportation• MichiganDepartmentofTechnology• MichiganMunicipalLeague
TheTAMCisworkingto:• ImplementrecommendationsofAct51Funding
Committee• Movefromneedsstudiestomanagingpavements
and bridges in the state• Seetheroadsystemasthecustomerseesit–with-
out boundaries• Workcooperativelyratherthancompetitively
betweenroadowningagencies.
Transportation Asset Management for Local Officials
http://www.michiganltap.org
Michigan TAMC Quick Facts
• Established by Act 499 of Public Acts of 2002
• Resources include Act 499 of Public Acts of 2002, Act 199 of Public Acts of 2007, and the Asset Management Guide for Local Agencies
• http://michigan.gov/tamc
Transportation Asset Management for Local Officialshttp://www.michiganltap.org