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Road weather models for increased traffic safety Torbjörn Gustavsson & Jörgen Bogren Road Climate Centre Göteborg University Sweden. Past 1983. PresentThe problemThe possibility 2005. How RWIS-data is used today. -1,8°C. Is it necessary to perform any maintenance activity???. +10°C. - PowerPoint PPT Presentation
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Road weather models for increased traffic safetyTorbjörn Gustavsson & Jörgen Bogren
Road Climate Centre
Göteborg University
Sweden
Past
1983
Present The problem The possibility
2005
How RWIS-data is used today
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-1,8°C
+10°C
Is it necessary to perform any maintenance activity???
The problem
• A lot of data is measured– 700 stations– several sensors– quality– representativity
• Interpretation requires good knowledge and integration with other sources
MDSS – maintenance decision support system
Information not data
-For road stretches
-About road conditions
-Overview or detail
-Interpreted
MDSS- summary
Integrate information from different scales and sources in order to give information about the prevaling conditions and a forecast for the next hours
Information to drivers
• About road conditions• Speed limits in
relation to severity– Snow– Ice– Rain– Fog– Wind
Information to drivers
Weather model
-Data from several RWIS-stations
-Thermal mapping
-Topoclimate
INPUT PROCESSING OUTPUT
60 – 120 km/h
Control measurements
E22, 1 Mars kl 08:50
0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
Avstånd (long)
Fri
ktio
n
Frequency of alarms due to snow
Alarm1 Alarm2 Alarm3 Alarm4 Total
E22 2003/2004 2,2 0,2 0,3 0,3 3,0
E22 2004/2005 3,3 0,4 0,2 0,3 4,2
E18 2003/2004 3,8 0,5 0,5 1,4 6,2
E18 2004/2005 3,7 0,5 0,5 1,1 5,8
Mean 3,2 0,4 0,4 0,7 4,8
A0= 110 km/h: A1= 90km/h: A2= 80 km/h:
A3=70 km/h: A4 =60 km/h
Best practices regarding RWIS-development
Maintenance tool
Maintenance decision support system
Process data into
information that helps
optimizing decisions
regarding activities
Information to drivers
Weather model
Warnings and speed
limit according to
prevaling road
conditions