@legoktm In every city where congestion charges get implemented, there are always mistakes at the beginning, such as people accumulating hundreds of fines or accidentally unpaid charges. Every time that happens, the alarmistic headlines (and the real hurt) are a gift to the opposers. Starting with lower prices reduces the cost of mistakes. Of course there's also a risk that the price is too low for the benefits to become perceptible, but you only need sufficient inertia to keep it going.