Problem is Maps/Drive data doesn't appear to be exactly the same source as the Maps site - some countries have traffic data on the site but not in app. (Besides the obvious lack of a nice list )
The same patch would not work. Did everything by hand. If you need the corrected files - in the attachment.
Unzip the file and throw 4 files with the replacement of /usr/lib/qt4/imports/ovi/connector/map/
So based on posts in this thread, Drive/Maps doesn't know how to reroute based on traffic condition? /sadpanda
For Drive, I seem to find the property to enable routing based on traffic. If we are lucky, the property is Router.useTraffic in models/RoutingModel.qml.
I haven't verified it yet so don't get too excited
Curious - at least locally the traffic info in Nokia maps and drive doesn't match the Nokia Maps website.
Some stuff on the website doesn't show up at all but the construction on the main highway is shown in different places. I'm not going for a drive just now to find out which is right!