1. 1 Maintenance Decision Support System Pooled Fund Study TPF-5(054) David Huft, South Dakota DOT AASHTO Research Advisory Committee Salt Lake City, Utah July 27, 2011 Connecting South Dakota and the Nation

2. 2 Why MDSS? nRising expectations of traveling public and commercial carriers nRising material & fuel costs nConstrained agency funding and staffing nReliable, timely, reports of conditions hard to get nSome weather conditions are difficult to forecast nPavement response to weather conditions and maintenance treatments is complex nNew deicing chemicals are available nRetiring maintenance staff replaced by less experienced workers

3. 3 What is MDSS? If you know… nroad characteristics ncurrent conditions npredicted weather nphysics & chemistry of snow, ice, chemicals navailable resources (material, equipment, schedule) MDSS can recommend… ntreatment type napplication rate noptimal timing …and predict nfuture road conditions with or without treatments

4. 4 How Does MDSS Work? Mass & Energy Modeling

5. 5 MDSS Prediction & Observation

6. 6 Desktop & Mobile Data and Recommendations

7. 7 Economic Benefits n3:1 to 8:1 estimated benefit/cost ratios nMitchell Region (SD) event example: $60/mile versus $300/mile nIndiana first-year statewide deployment in winter of 2008/2009 –Substantial reduction in salt use ($12M) –Reductions in overtime ($1.3M) & fuel –Estimated savings of $11M overall after normalizing for winter conditions –~27% of normal winter maintenance budget

8. 8 Pooled Fund Study Benefits nCollaborative research and development Opportunity to “test drive” MDSS nConvenient funding mechanism nLearning environment State ↔ State State ↔ Developer nNationally prominent forum for advancing MDSS and related technologies For additional information, contact: David Huft SDDOT Research Program Manager 605.773.3358 dave.huft@state.sd.us