Central Indiana public transportation projects.

Requires the budget agency to withhold local income tax revenue from an eligible county if the eligible county fails to raise certain revenues for a public transportation project. (Current law requires eligible counties to raise: (1) 10% of the annual operating expenses of the project from sources other than taxes and fares; and (2) 25% of the annual operating expenses of the project from fares and charges.) Specifies that the amount of local income taxes withheld from an eligible county may not diminish the amount of money distributed to the eligible county for deposit in the eligible county's public transportation fund below the amount required to pay its debt service obligations for bonds issued for purposes of a public transportation project. Prohibits Marion County from creating additional IndyGo bus rapid transit lines if the revenue requirements are not met.