Businesses are increasingly concerned about the Berejiklian government's willingness to proceed with the second stage of Parramatta's multibillion-dollar light rail line.

Almost two years ago, Transport Minister Andrew Constance said he was hopeful construction would start on the second stage of the line from Rydalmere to Olympic Park before 2020.

But on Tuesday, Mr Constance said the government did not have a timeframe for the beginning of works on the stage, saying its focus was on the first part of the project and a new metro rail line from the centre of Sydney to Westmead.

Transport Minister Andrew Constance and Premier Gladys Berejiklian inspect the first tram to reach Circular Quay, the northern end of a new light rail line from the CBD to Sydney's south east. Credit:AAP

"Our focus at the moment ... is getting Parramatta stage one under way in terms of its build and at the same time Metro West, which is the game changer for western Sydney in terms of having a direct train line to benefit three million people," he said.