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Observation Data Requirements
for Surface Transportation
Paul PisanoTeam Leader, Road Weather
ManagementFederal Highway Administration
3rd National Surface Transportation Weather SymposiumTysons Corner, VA
July 26, 2007
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Topics to discuss
• Adequacy of:– Sensors (coverage, type)– Archiving technologies, techniques
• Robustness of:– Collection processes– Assimilation processes
• Prospect of new or advanced sensors to meet needs
• Extent to which we can detect/predict extreme weather events
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ESS Owned by State DOTs
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25 State DOT Networks + E-470 Highway Authority, Colorado
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68
47
103
66 109 54
3241
62 2392
5354
31169
48
37
40
39
59
60
2
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1,331 ESSavailable via
MADIS
State DOT ESS Available via NOAA MADIS
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Anytime, Anywhere Road Weather Information
Route Specific Radio & TV
Broadcasts of Travel Conditions
More Effective Websites
Credible & Precise Travel Advice
Add Detail to HAR & VMS
Spawn New Technologies
(PDA, cell)
Enhanced decision making tools
In-vehicleInformation
Clarus
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The Clarus Initiative
• Clarus is an R&D initiative to demonstrate and evaluate the value of “Anytime, Anywhere Road Weather Information” that is provided by both public agencies and the private weather enterprise to the breadth of transportation users and operators.
• To do so, we needed to create a robust• data assimilation, • quality checking, and • data dissemination system
that can provide near real-time atmospheric and pavement observations from the collective states’ investments in environmental sensor stations (ESS).
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The Clarus System
State DOTRWIS Server
CollectorServices
QualityChecking
WebPortal
7 DayData Cache
MetadataCache
The Clarus System
State DOTRWIS Server
State DOTRWIS Server
State DOTGPS/AVL
VII Probe-Based Data
Nationwide Data Management System forSurface Transportation Environmental & Pavement Condition Observations
•Observations•Metadata•Quality Flags
Environment CanadaRWIN Server
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Vehicle-based Elements
• Hours of operation• Elevation • Accelerometer data• Vehicle speed• Heading• Rate of change of
steering wheel• Exterior temperature• Windshield wiper setting• Rain sensor• Sun sensor• Adaptive Cruise Control
(ACC) radar
• Atmospheric Pressure
• Ambient noise level • Headlights• Relative humidity • ABS• Traction control• Stability control• Pavement
temperature• Brake
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VII Data
WeatherData
Translator
(Radar, ASOS)
OtherWeather
Data
QCh’d obs
Info.Service
Providers
VII – A New Road Weather Source
RoadWeather
Obs (fixed)Clarus
(or otherassimilator)
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Research Needs & Challenges
Data Volume, Fusion and Quality
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Where are the gaps?
• Sensors– There are gaps in sensing, who should fund?– Road Condition– What about phased array?
• Observations Networks– Build interest/reliance within transportation
agencies– Ownership of data / liability– Mobile sensing
• Weather Data Translator• Path to operations
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Contact Information
• Paul Pisano– Team Leader, Road Weather
Management– Phone: 202-366-1301– Email: [email protected]
