The Greens want to scrap Wellington's proposed Transmission Gully, Basin Reserve flyover and Kapiti Expressway roading projects and redirect $2.4 billion into light rail, better bus services and local roads.

The party has just released its Wellington transport policy aboard a Green bus travelling through the central city.

Transport spokesman Gareth Hughes said the Greens would develop a light rail network through the city which would eventually run to the airport.

The Government was fiscally irresponsible to spend so much on roads when there was no business case for the projects.

"Around the world governments are giving people real options to leave their cars at home and that is the best way to ease congestion on the roads."

The $1.2 billion Transmission Gully would not be used by many trucks because it would be too steep, he said.

The Greens would revert to the original Western Link road for Kapiti.

-Fairfax NZ