Matthew Yglesias, business and economics correspondent at Slate magazine makes the point, in a pithy and simple to understand article, that:
"slow progress in transportation quality isn't really a technological issue. The reason we have traffic jams is that road access isn't priced properly."
He says quite rightly, that both roads and parking being underpriced, means people go to congested central cities and circulate looking for parks, causing congestion. It isn't because there is a lack of technology to do smart and intellligent pricing of roads or car parks, but because of a lack of political will to apply economic instruments.