Cashflow difficulties caused by the Christchurch earthquakes and other factors have persuaded the Government to increase the Transport Agency's overdraft facility by $90 million.
Failure by the Ministry of Transport to record payments of $180 million from the national land transport fund has also compounded the cash squeeze, says a report to the agency's board, made public under the Official Information Act.
That meant the agency thought it had much more cash than was available, after it made a withdrawal from a Government facility of $250 million.
The facility has since been increased to $340 million after the Transport Agency's board ruled out trying to change the organisation's terms of trade for payments to local authorities and suppliers, partly for fear of undermining its reputation.
An exception has been an agreement with Auckland Transport for the agency to delay subsidy payments for some projects, including a programme of road and busway improvements around Panmure and Pakuranga.