Auckland commuters will be able to use one of the city's biggest new roading projects, the Victoria Park Tunnel, three months earlier than planned.
The tunnel is the first of the Government's seven roads of national significance and is aimed at easing congestion of traffic traveling to and from the North Shore.
Transport Minister Stephen Joyce announced that the $340 million project will be finished in March next year, while two north-bound lanes will open in November this year.
Mr Joyce says the new road will remove one of the key choke points for the 160,000 vehicles that travel the route each day.
The Transport Agency says the project is likely to come in within budget.