The Green Party has launched its Auckland Transport Policy calling for an electric rail loop through central Auckland, to connect with loops to the airport and the Northern Busway.
Co-leader Jeanette Fitzsimons said the plan could be funded without imposing extra taxes or rates, by moving investment out of new motorways.
She said that would release $400 million in the first year, and more every year after that.
Ms Fitzsimons says it is not possible to put a dollar figure on the transport plan, as it would be an incremental project carried out over a number of years.