Cleaner than a bus and cheaper than light rail, track-free trams could be shuttling passengers along Parramatta Road within the next five years.

Track-free trams? Yes, that's what they're calling them. And the Inner West Council is pushing the idea as a solution to the transport woes of the Parramatta Road.

The Inner West Council wants track-free trams, like the one pictured, to carry commuters along Parramatta Road.

In fact, four councils in Sydney's inner west are supporting the notion, which they see as a potential "game changing" public transport option to be introduced concurrently with the WestConnex motorway.

"There have been more than a dozen plans to transform Parramatta Road over the years – and they have all failed due the lack of commitment to a real public transport solution," said the administrator of the Inner West Council, Richard Pearson.