The state government's determination to deliver below 20-minute trips between Parramatta and central Sydney on its proposed Metro West rail line is set to limit the number of stops along the line.
According to Transport Minister Andrew Constance, fast journey times are one of two main objectives of the project, along with relieving pressure on the over-crowded T1 Western Line.
But the drive to secure fast trips could disappoint an increasing number of interest groups clamouring for new stops, as well as those advocating for easier access around the inner west.
Labor's transport spokeswoman, Jodi McKay, said the opposition was "not wedded to a journey time of 20 minutes".
"For us it is about having public transport where you don't have public transport, and also looking at the issues on Parramatta Road," she said.
Ms McKay said a potential stop at Sydney University, as opposed to the Bays Precinct around Rozelle, should be "in the mix".
"We are keeping an open mind," she said.
Mr Constance has flagged the possibility of combining the best of both worlds: using "passing loops" to enable fast trip times, while also providing for more stops.
He has said federal funding could help pay for those passing loops, though, when the federal Labor Party promised $3 billion for the Metro West line, Mr Constance declined to repeat his request for funding.
A "passing loop" approach would please Mr Thalis, who said there was an "obvious need" for stations "in Pyrmont, Five Dock and Concord - which has one of the lowest levels of public transport use in the inner suburbs".
"Why would you bypass areas when you are having a metro running straight through it?"