$37 billion plan to tackle south-east Queensland's transport problems over the next 20 years has been unveiled by Brisbane’s Lord Mayor Campbell Newman.

The Transport Plan for Brisbane 2006-2026 aims to boost the bus, ferry and rail network to cope with population increases that are now predicted to reach 3.7 million by 2026, with two million of those living in Brisbane's metropolitan area. The plan expects a 31 percent increase in vehicle trips in the city.

Key to this plan is an expanded public transport service with greater integration. It also includes four new bus depots and an increase in fleet size from 850 to 1450 by 2016.

The plan sets strategic objectives that include new ferries, more buses and trains, better roads, public transport hubs and more clean green personal transport.