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MDSSMaintenance Decision Support SystemRoad Weather Forecasting System
Ing. Tomas Pospisek
Head of Sales
CROSS Zlín, a.s., Czech Republic
Maintenance Decision Support System2
CROSS Company
Road traffic technology manufacturer since 1994
Maintenance Decision Support System3
Winter Road Maintenance Decision Support
Maintenance Decision Support System4
APPLIED FORECAST
Key approach to maintenance decision support
HISTORICAL DATA
CURRENTDATA
WEATHER FORECAST
…built up on expert knowledge of processes between atmosphere and the pavement
↘ Sophisticated perspective of future road conditions
Maintenance Decision Support System5
Definition and motivation
• Complex road weather forecasting system• Precise short-term local forecast of road slipperiness• Synthesized and clear graphic information so the
decision-making is truly simplified
To support the right decisions
To increase safety on the
roads
To support material savings
Maintenance Decision Support System6
MDSS key features
• Integration of all relevant information sources• Every hour• With 1 hour step• For upcoming 24 hours• For each 1 km of the road network
Maintenance Decision Support System7
Maintenance Decision Support System
Online packageLocal geodatabase
Thermal mapping
Geographical info
Expert information
Traffic flow data
Road construction
Weather prediction model
Weather stations
Maintenance data
Floating Car Data
Traffic flow data
Maintenance Decision Support System8
Thermal mapping of the road surface
• Full-featured utilization• Spatial variations of minimum night-time road surface
temperature• Highest spatial detail compared to other sources
Maintenance Decision Support System9
Maintenance dataRoad condition
Road condition
PERFORMED TREATMENT
WITHOUT MAINTENANCE
MAINTENANCE DATAINCORPORATED
Maintenance Decision Support System10
Model outputs
• Road condition• Road surface temperature• Snow amount • Freezing point
HazardousSlipperinessDrifting snow – alarmDrifting snow – warningSnowMoist, wetDry
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Selective maintenance
• Basic processing unit is road stretch of 1 km length• Accurate local prediction of road slipperiness• Precisely targeted maintenance intervention on
particular risky place within the road network
Maintenance Decision Support System12
MDSS in the Czech Republic
• Highways 250 km• Ist class 1537 km• IInd class 3960 km
• 2007 - 2011• 5900 segments• 70 + 25 weather sites
Maintenance Decision Support System13
Regular accuracy evaluation
• Temperature error in first 4 hours of forecast• Season 2009/2010 in the Pardubice region
No. cases
Tolerance
55 % ± 1 °C
78 % ± 2 °C
96 % ± 5 °C
5 % ACCURATE AT 1 DEC. PLACE
Maintenance Decision Support System14
Mean and mean absolute error in road surface temperature forecast in 2009/2010 in the Pardubice region for all road weather stations
OFTEN OPTIMISTICOFTEN PESSIMISTIC
Maintenance Decision Support System15
Error in road condition forecast in 2009/2010 in the Pardubice region for all road weather stations
BAD
GOOD
User output
25th January 2011
Maintenance Decision Support System17
User output
Maintenance Decision Support System18
Ready-made extensions
Maintenance map
• accumulates maintenance data from last several hours to show the overview of performed treatment
Station forecast graphs
• for all stations in a region
MDSSMaintenance Decision Support SystemRoad Weather Forecasting System
Ing. Tomas JURIK
Chief Executive Officer
CROSS Zlín, a.s., Czech Republic