why would dynamically pricing tolls cause less traffic? Especially in the morning rush hour - you gotta get to some place by a specific time, you have to pay the toll no matter what it was (with reasonal maximal prices of course). its only when there is an unreasonable maximal price (or no maximal price) that people's behaviour would change - imagine a toll of $500 during peak. It would put off people from going on the road.
