The Greens have launched a major policy initiative that would change the direction of Australia's transport funding, from Roads to Rails.

Roads to Rails would allocate at least 25% of Commonwealth transport funding via
AusLink 2 to low-polluting mass transit and freight alternatives.
That's some $5.6 billion from 2008-09 to 2013-14 directed away from
roads to rail, busways, cycleways and similar clean options.

Beyond 2014, after a few years to ramp in, Roads to Rails
would see 50%+ of AusLink 3 funding allocated to the clean
alternatives. Only then, once a majority of funding is going to
alternatives to roads, will our priorities be coming into line with
what the combined climate change / peak oil crunch makes necessary.

You can read a blog post on the policy here and the media release here.