It should be the other way around. Toll roads should subsidize public transit.
This is a win-win situation for car drivers and public transiteers. Public transit could afford to extend/improve rail lines, lower fares for passengers, make parking-lots at stations larger, provide infill stations, and provide more trains for faster service. Car drivers could face less traffic because of toll roads, and have the option of using mass transit for at least part of their daily commute. Furthermore everybody benefits because less traffic means leads to better air quality and few auto accidents.
