The NSW government is paring back its ambitions for Parramatta Road, reducing the number of new properties it wants to build on the corridor from 50,000 to 40,000 in the next 30 years.

But plans for improved public transport through the area remain vague, gauging by a new "urban transportation strategy" for Parramatta Road released on Thursday.

When Infrastructure NSW first released plans for the WestConnex motorway through Sydney's inner west in 2012, the advisory body said part of the plan for the motorway was to use it to redevelop Parramatta Road into a boulevard comparable to those in Barcelona and Paris.

However a draft plan for the corridor, released last year, was heavily criticised for being light on detail, despite millions being spent on a public relations campaign.