The basis for the reimbursement of the RTA's expenditure was not intended to be only for costs incurred. The BCF was an amount to be paid on top of the Development Fee. However, as the development costs rose, there was little distinction made between the two fees.
The RTA accepted responsibility for significant cost increases later. To cover these costs, preserve the upfront payment, and avoid using its funds, the RTA negotiated two deals with CCM. The first deal changed the way the toll escalates and the second increased the base toll by 15 cents.