Connecting South Dakota and the Nation

Maintenance Decision Support System

Pooled Fund Study TPF-5(054)

David Huft, South Dakota DOTMDSS Stakeholders Meeting

Boulder, CO October 20-21, 2005

Maintenance Decision Support System

Pooled Fund Study TPF-5(054)

David Huft, South Dakota DOTMDSS Stakeholders Meeting

Boulder, CO October 20-21, 2005

Connecting South Dakota and the Nation

Project PartnersProject Partners

Colorado DOT Indiana DOT Iowa DOT Kansas DOT Minnesota DOT North Dakota DOT South Dakota DOT

(lead state) Wyoming DOT Federal Highway Administration Meridian Environmental Technology

Winter Maintenance ChallengesWinter Maintenance Challenges

Rising expectations of traveling public and commercial carriers

Constrained agency funding and staffing Reliable, timely, specific reports of conditions

difficult to obtain Some weather conditions are difficult to forecast Pavement response to weather conditions and

maintenance treatments is not well established Effects and effectiveness of innovative

maintenance treatments not well understood Retiring maintenance staff replaced by less

experienced workers

Project ObjectivesProject Objectives

Assess needs, benefits, and receptivity to MDSS in participating DOTs

Define functional and user requirements for an operational and sustainable Maintenance Decision Support System

Evaluate FHWA Functional Prototype Build and evaluate an operational and

sustainable Maintenance Decision Support System

Improve the ability to forecast road conditions in response to changing weather and applied maintenance treatments

Essential Elements of MDSSEssential Elements of MDSS

Report actual road surface conditions Report actual maintenance treatments Assess past & present weather conditions Assess present state of the roadway Predict storm-event weather Recognize resource constraints Identify feasible maintenance treatments Predict road surface behavior Communicate recommendations to supervisors

and workers

Essential ElementReport Actual Road Surface Conditions

Sources RWIS Visual Observation On-vehicle SensorsFrequency Real time Near real timeMedia Wireless Telephony Graphical User

Interface

Items Reported Pavement

temperature Pavement moisture

type Pavement moisture

depth Blowing snow

Essential ElementReport Actual Maintenance Treatments

Sources Supervisors Truck operators On-vehicle sensors

Media Wireless Telephony Graphical User

Interface

Elements Reported Time & Location Plow Position Material(s) Applied Application Rate

Essential ElementAssess Past, Present Weather Conditions

Sources RWIS FAA / NWS Radar Satellite Field Personnel On-vehicle sensors

Conditions Reported Air Temperature Dew Point (Humidity) Wind Velocity Precipitation Type Precipitation Rate Blowing & Drifting Cloudiness Visibility

Essential ElementAssess Present State of the Roadway

Methodology Pavement Model with

the Capability of Integrating:

– Observed Weather– Reported Road

Conditions– Reported

Maintenance Actions

Items Predicted Pavement

type(s) Pavement moisture

depth(s) Chemical

concentration(s) Percent ice

Past Future

Essential Element

Predict Storm Event WeatherEssential Element

Predict Storm Event Weather

Methodologies Computer Model Ensemble of Models Meteorologists Man/Machine Mix

Time Horizon Near-term (<6 hours) Long-term

Items Predicted Air Temperature Dew Point (Humidity) Wind Velocity Precipitation Type Precipitation Rate Blowing & Drifting Cloudiness/Radiation

Essential ElementIdentify Feasible Maintenance Treatments

Identify Treatment Type Treatment Timing Application Rate

Resource Constraints Vehicles Attachments (by

vehicle) Materials (by vehicle) Staff Schedules Cycle Times Priorities

Essential ElementPredict Road Surface Behavior Essential ElementPredict Road Surface Behavior

Methodology Pavement Model with

the Capability to Predict the Effects of Maintenance Actions

Time Horizon Near-term (<6 hours) Long-term

Items Predicted Pavement

type(s) Pavement moisture

depth(s) Chemical

concentration(s) Percent ice

Essential Element:Communicate Recommendations Essential Element:Communicate Recommendations

‘Optimal’ Treatment Maintenance action

deemed optimal by the system; safety first, cost second

‘Standard’ Treatment Anticipated maintenance

based on standard local operating practices

‘What-If’ Treatments Allows user to try any

number of alternative maintenance actions

Media Graphical User Interface Wireless

Information Provided Anticipated or

recommended maintenance action(s)

Expected impact of those maintenance actions on the roadway

Project Timeline (simplified)Project Timeline (simplified)

Assess States’ Needs, Readiness

Evaluate Functional Prototype

Develop MDSS Software

6-State Limited Deployment

Refine Pooled Fund MDSS

Validation Studies

8-State Field Trials

Full Deployment2007

Extensive Deployment

What Have We Learned?What Have We Learned?

MDSS is tactical as well as strategic In-truck instruments are essential

– Reporting road conditions– Reporting treatments by location (AVL)

Agency factors are critical– Agency culture & practice– Agency resources ($, equipment, people…)– IT, communications environment

Scale-up issues are hugely significant “Essential Elements” are truly essential

Technical DirectionsTechnical Directions

More Extensive Deployment Weather & Road Prediction Validation In-Vehicle Instrumentation In-Vehicle Information to Operators Improved Physical Models

– Difficult Weather Conditions– Chemical Effects

Integration with DOT Information Systems (Equipment, Scheduling, Traveler Information, etc.)

Cost Analysis & Tradeoffs

Sustainability IssuesSustainability Issues

Intellectual Property– NOT Public Domain– Equity for partners and non-partners

Architecture– Open Architecture– Interface Standards– System Modularity

Institutional Issues– Fit to specific DOT cultures & practices

Advancing the State of Art & Practice

Partner ResponsibilitiesPartner Responsibilities

Contribute Financially Contribute Intellectually

– Project Panel Meetings– Conference Calls– Technical Product Reviews

Conduct Field Trials Intellectual Property Stewardship

For More Information:For More Information:

ContactDavid L. Huft

SDDOT Office of Research

700 East Broadway

Pierre, SD 57501-2586

Phone: 605.773.3358

Fax: 605.773.4713

dave.huft@state.sd.us

Look at http://mdss.meridian-enviro.com

http://www.pooledfund.org

Connecting South Dakota and the Nation

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