The ACT Government says a new report damning Canberra's public transport systems, does not include recent light rail commitments.

A new report from the Royal Melbourne Institute of Technology (RMIT) labelled Canberra's public transport policy a spectacular failure and shows Canberra is the only Australian capital city to see a decline in the number of people using public transport compared to 2006.

The number of Canberrans driving cars to work is the highest on record.

The report says the Government's focus on road building means Canberrans are driving more and using public transport less.

But Sustainable Development Minister Simon Corbell says the latest Government announcements have not been included in the report.

"I'm disappointed the report doesn't take into account the significant policy developments over the last six months," he said.

"In particular, new targets to improve waiting times for commuters, the investments we're making in improving the rapid public transport services.

"At the same time [the report] ignores some of the important policy developments such as the development of the light rail corridor."

Though Mr Corbell admits more work needs to be done on improving public transport services.

"The cheap availability of motor vehicle transport is a driving factor," he said.

Opposition spokesman Alistair Coe says the Government has taken the wrong approach.

"The Government has simply thrown money at it, into ACTION buses, but not actually looked at how do we actually make the buses better," he said.

Mr Coe says light rail alone may not fix public transport in the capital.

"There is some satisfaction with the in-town bus services," he said.

"If you're going from Belconnen to the city or Gungahlin to the city on to Woden or Tuggeranong, that part of the transport system seems to be working quite well.

"What they're doing by putting in light rail is actually replacing one of the best aspects of the public transport system."

The study says Sydney is the nation's sustainable transport capital, with the highest rates of public transport.

The ACT Government has announced a fare increase for ACTION bus services from next month to cover increasing costs and network improvements.