The government's planned congestion charging scheme has stalled, with the National Party opposed to it and the new transport minister non-committal on next steps.
The National Party is welcoming an investigation into any potential conflict of interest in contracts between government agencies and the company owned by Nanaia Mahuta's husband.
Three options were presented to Cabinet last year, each of which run from the City Centre to Mount Roskill, to Māngere, to the airport, at a cost of between $9 billion and $16b.