I think studies which measure traffic congestion in the US based on road building over the last couple decades IMHO are flawed. That is because I believe how a

I think studies which measure traffic congestion in the US based on road building over the last couple decades IMHO are flawed. That is because I believe how and where you build the road is more important than how much road you build. For example, where I live the main roads in the city proper haven't been upgraded in the last 40 years. Yet, new roads funneling drivers from farther and farther out are being constructed all the time. This simply means that the first 1/2 of many drivers commutes involves sailing along a new road until they hit the old roads, and then puttering around at 5mph (or worse) for the last 5-10 miles of the journey.