Embed Size (px)
Citation preview
1
MDSS and Advanced ForecastingSTSMO Weather Workshop
Dave Huft, SDDOT Research Program ManagerSeptember 12, 2017
Connecting South Dakota and the Nation
Weather Impacts & Strategies
Winter – perceived as most
significant threat to public highway safety
– several events/year
Other severe weather– high winds– flooding
Travel advisories Interstate closuresDetours Emergency response
Winter maintenanceWinter maintenance
decision support Traveler information
2
MDSS Pooled Fund StudyTPF-5(347)
Jointly led leading-edge R&D
Convenient funding mechanism
Low-risk opportunityto deploy
Learning– State to State– Contractor to State– State to Contractor
Intellectual property: open but not public domain
Nationally prominent forum to advance MDSS technology
3
Why Maintenance Decision Support?
Rising demands of travelers & commercial carriers
High labor, material, equipment & fuel costs Constrained funding Reliable, timely condition reports hard to get Some weather conditions difficult to forecast Complex pavement response to weather,
maintenance treatmentsNew deicing chemicals & techniques Environmental concerns Staff size, turnover, and inexperience4
What is MDSS?
If you know… road characteristics current conditions predicted weather physics & chemistry of snow,
ice, chemicals available resources (material,
equipment, schedule)
MDSS can recommend… treatment type application rate optimal timing
…and predict future road conditions with or
without treatments
6
PassingDriving
MDSS Concept
Modeling Reality
MDSS Pooled Fund Study
Example Deployment Levels
7
Each state pays its
own operational costs
Graphical User Interface Map View
Air Temp
Dew Pt
Snow Accumulation
Snow Rate
Wind Speed/Dir
Freezing Rain / Sleet ProbabilityRain Probability
Snow Probability
Precipitation Type
Graphical User Interface Route View
Graphical User Interface Route View
Mobile Data Collection
Real-time data from ~100 maintenance vehicles– Location– Road temperature– Air temperature– Observed precipitation– Observed road conditions– Plowing activity– Chemical type & rate
Training & Evaluation
“Storm playback” of recent or saved storms at user-defined pace– Evaluate
maintenance operations
– Train new employees
– Predict effects of programmatic changes
Support emergency and traffic management
SDDOT Experience
MDSS Mobile App
Android™ iPhone Simple
interface14
Current Efforts & Concerns
Web-Based MDSSMobile Data Collection
– Next generation MDC– Expand routes &
vehicles– Mobile platforms
Management Reports– By route, vehicle, storm,
season, area
Intellectual Property– IP generated within the
Pooled Fund Study– Regarding MDC15
MDSS Pooled Fund Study
Benefit/Cost Studies
3:1 to 8:1 b/c ratio estimate by Western Transportation Inst.
Indiana 1st-year deployment 2008/2009
– $12M reduced salt use – $1.3M overtime & fuel– $11M overall after
normalizing for winter conditions
– ~27% of normal winter maintenance budget
SD can’t estimate savings because of change to “salt only” at same time
MnDOT savings winter 2009-2010
16
Traveler Information Media
17
Where We Were—Limitations
Road conditions reported by SDDOT maintenance staff, not 24/7
Off-hours info could be outdated or misleading
Travel info did not directly use:– Maintenance Decision Support System (MDSS)
road condition forecasts– Maintenance Data Collector (MDC) observations– Environmental Sensor Station (ESS) observations– Some important NWS messages
Weather-related travel info did not get to DMS18
MDSS Feed to Travel Info(SD 24-hour road condition threats)
19
MDSS-Based Threat Forecasts
Can view base layer with threat forecast shown
20
Threat Text Description
24-Hour Threat Forecast (What is this?) The following road condition threats are
forecasted for 10AM CST Sat through 10AM CST Sun. Actual road conditions
may vary from this forecast. Motorists are cautioned to be alert to changing
conditions.
• from Junction South Dakota 47 North-Bowdle to Junction South Dakota 247-
Roscoe
• lightly icy road conditions possible between approximately 9PM Sat and
7AM Sun.
• from Junction South Dakota 247-Roscoe to Junction South Dakota 45 South-
Ipswich
• lightly slushy/icy road conditions possible between approximately 7PM
Sat and 9AM Sun.
• from Junction South Dakota 45 South-Ipswich to 7.75 miles east of Junction
South Dakota 45 North
• snowy/slushy/icy road conditions possible between approximately 7PM
Sat and 6AM Sun.
21
Extent of Use for Threat Layer
Most requests for road segment reports originated from regular road conditions map– 80% from regular map– 20% from threat map
Regardless of origin, 2/3 of requested segments contained threat information– typically more significant content for current and
forecasted conditions
22
Ease of Use
23
Usefulness of Information
24
Impact on Driving Behavior
25
SDDOT ESS Website/Apps
26
Next Steps Underway
Continue use of weather threats
Mobile app for road condition reporting
Expansion of ESS network
Traffic incidents via link to SDHP dispatch
More complete construction & maintenance info
Use variable speed limits based on:– road condition– surface condition– visibility– prevailing speed
More proactive use of DMS in weather-related events
27
28
Questions?
1.
2.
3.
4.
5.
Please contact:
SDDOT Office of Research
Dave HuftPhone: 605.773.3358
Fax: [email protected]
Thank you!
