"Tiger 2013 will contribute to increased mobility for people and freight, and economic growth by helping to improve existing and develop new transportation facilities that will strengthen our competitiveness and create jobs," says US federal transportation secretary Mr Ray LaHood.

Applications for Tiger grants are due by June 3 and eligible projects include public transport, passenger and freight rail schemes, as well as highways, bridges, and ports. Grants can range in size from $US 10m to $US 200m. Tiger funds must be allocated by October 1 2014 with priority being given to projects that are ready to proceed quickly.

The four previous rounds of Tiger provided $US 3.1bn to support 218 projects throughout the country.