DP WORLD and NSW Ports are co-investing A$400 million (US$25 million) to extend the rail terminal at Port Botany in Sydney to double capacity to one million TEU a year, reports Singapore's Splash 247.

The project - which will start on site in June and take two years to compete - comprises the addition of five new rail sidings to accommodate 600 metre long regional trains.

"This will enable more containers to be moved by rail, reducing the growth of trucks on roads and deliver greater efficiency," said NSW Ports CEO Marika Calfas.

"Port Botany is uniquely the only port in Australia with on-dock rail within each container terminal, connected to an extensive network of metropolitan and regional intermodal terminals including by dedicated freight rail," she said.