I interpreted the miracle to be that it achieves a political goal AND makes money. From TFA: “… congestion pricing is a policy unicorn - it accomplishes a key

I interpreted the miracle to be that it achieves a political goal AND makes money. From TFA: “… congestion pricing is a policy unicorn - it accomplishes a key goal (reducing congestion) and raises money. This is in contrast with highway widenings which are the opposite: they cost money (often billions of dollars) and fail to accomplish the goal of reducing traffic due to induced demand.”