More than 400 construction jobs will be created during a $110 million road upgrade project at the Port of Brisbane.

The 3.2 kilometre road, linking the port to the motorway will be widened, more than doubling the current traffic capacity from 12,500 to 28,750 vehicles.

Each day, 2500 port workers use the road, while 1500 trucks carrying 1.1 million containers pass through the facility each year. Capacity is expected to rise by four per cent annually.

Construction will begin next year and is being carried out to reduce congestion and improve safety.

The upgrade is the final stage of improvements to the Port of Brisbane Motorway which has included extending lanes and building six bridges.