flow speed

There is no question that congestion is a serious problem in this country -- and a crippling problem in some cities.

 Nor is there any question that congestion is much worse than it was ten years ago, even if high gas prices and the recession have caused it to level off in some places.

There is no question that congestion is a serious problem in this country -- and a crippling problem in some cities.

 Nor is there any question that congestion is much worse than it was ten years ago, even if high gas prices and the recession have caused it to level off in some places.