Actually this is a form of progressive taxation that has less impact the poorer you are. Because the poor are less likely to pay for the roads, they on the average pay less taxes. And given that the road was previously completely banned, they also have access to plenty of alternatives, be it taking other roads or carpooling. On the other hand, the ‘dumb rich’ will pay out of their nose to not have to share their car with someone else.
>Because the poor are less likely to pay for the roads, they on the average pay less taxes
That is assuming that this isn't a critical road that poor people would want to use.
Anyway, I'm not talking about this specific case, I mean more generally that this isn't as simple as was made out, e.g. what if this road is good overall for balancing out wealth (if you view that as a good thing...), but then another case happens where it is a critical road that causes poorer people to have to extend their travel by 20 minutes to avoid the toll? (Ala sydney).