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U.S.
Department of Transportation
Open Source Portal Use Case
Connected Vehicle
Data
![C:\Documents and Settings\m23505\Local Settings\Temporary Internet Files\Content.IE5\M1K5RSTB\MCDD01775_0000[1].wmf](slide0457_image205.gif)
RDE
Data
Environment
1: Estimator uses data from RDE, resides
in OS Portal and estimates vehicle approach time to intersection
![MCj04348980000[1]](slide0457_image209.gif)
![MCj04339420000[1]](slide0457_image210.gif)
2: Researcher “Sally” interested in adding
pedestrian approach time to intersection downloads source code
2
1
3
3: “Sally” modifies code to add pedestrian
approach. “Sally” implements version 2 prototype and
uploads source code
for version 2 back into OS Portal
4: Freight researcher “Mac” interested in
adding approach time for freight vehicles
downloads estimator version 2
4
5: “Mac” modifies code to add freight vehicle
approach times. “Mac” implements version 3 prototype and uploads
source code for version 3 back
into OS Portal
![MCj04348880000[1]](slide0457_image214.gif)
5
6: Transit researcher “Finn” interested in adding
approach time for buses downloads estimator version 3
6
Estimator
Version 1
Version 2
Version 3
Vehicle
Vehicle
Ped
Vehicle
Ped
Freight