As there isn't on I thought I'd start one as I think Traffic Congestion is a sign of a healthy economy and the levels of congestion or bizziness thereof seem to be lacking on all but the most trunky roads.
I'd go as far as saying that congestion is a fraction of what it was 5 years ago thus making new road building totally irrelevant along with smart motorways.
Even on my commute, same times every day there are never usually more than a handful of cars in front at any junction at 4:30pm.
The economy (other than government printy spending) is in reality in the last chance saloon.