What a waste.
Even though the current toll is $8 for a car, and it collects $1 million a day in tolls, the toll needs to go a lot higher. The people crossing the bridge right now are already paying more than $8--they're paying it in time and gas. The time spent crossing the bridge is gone forever. The gas burned crossing the bridge is gone forever too. The money paid to cross the bridge... that's still worth something. Bump the toll up to $20 and use the extra money to expand capacity. Keep bumping the tolls and expanding capacity until you're not making people pay by wasting.