Detailed Instructions: In this task, you are given a summary for US Congressional and California state bill, your task is to generate a Title for this bill. The preferred titles are under forty words and mention the purpose of the bill.
Problem:Toll Credit Marketplace Act This bill directs the Department of Transportation to establish and implement a pilot program to develop a toll credit marketplace for states to buy and sell toll credits. States may use funds from the sale of toll credits to offset the nonfederal share of the cost of any transportation project.     The Government Accountability Office shall study and report on the performance of the toll credit marketplace. 
Solution:
Toll Credit Marketplace Act