The thing about a congestion tax is that if it’s effective at getting drivers to mode shift to transit, it also makes things better for drivers who do continue

The thing about a congestion tax is that if it’s effective at getting drivers to mode shift to transit, it also makes things better for drivers who do continue to drive, since they deal with less traffic. If a large group of people is excepted from the fee, they may start to mode shift in the reverse direction because they get the benefit without the cost.