I think you want "increase in traffic " in this context. - Is there much traffic congestion where you live? - Yes.
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Nor Priest How about traffic congestion in your city ?This is not a complete question. You need a verb. i.e. How bad is the traffic congestion where you live?/ in your city?
Nor Priest" The increase in car ownership in 2002 -2012 "This one is formal enough, and it could be a title for your paragraph, but I don't recommend the others.