Well if you are going to own and maintain a bridge privately, you actually *do* need a source of revenue. Noone is forced to buy gas there.
Generally speaking, though, sure, it's a raw deal for others. Just like every single municiplaity with an automotive facility in it gives property tax breaks to the auto companies, even though their traffic tears up the roads, etc. Oh...but they provide jobs, etc. And on and on it goes...corporations get tax breaks everywhere, not just bridge owners.
then again, corporations paying taxes is a lie anyway. Corporations don't pay taxes...YOU pay taxes when you purchase goods and services from the corporation, because the taxes are baked in to the price. Only, now the government is double dipping, because you pay a % sales tax, for example, on the taxes baked into the cost of a product. Get it...
Corporate taxes should be eliminated.