Melbourne Lord Mayor Robert Doyle has defended the council's decision to replace a vehicle lane on .
An inbound traffic lane was removed yesterday and the ABC has received a raft of complaints, saying the changes have caused gridlock in the area.
One caller to ABC local radio complained that it took about a half an hour to travel from the Shrine of Remembrance to the Arts Centre.
But Mr Doyle says the council's modelling shows there should not be dramatic increases in travel times.
"I'm not sure where this is coming from because we have not altered the light sequence that lets you onto Flinders Street from Princes Bridge," he said.
"That valve that allows you into Flinders Street has not altered. It is still letting through 19 to 20 cars on each cycle."
Mr Doyle expects congestion over the bridge as people get used to the new arrangements.
He says people need to do the right thing to ensure travel times are kept to a minimum.
"If people don't obey the road rules and they block up intersections then no road is going to work," he said.
"People were a bit nervous because the queues would be a bit longer, but what you find is once you get closer down towards the bridge it woeks perfectly well so it takes people a bit of time."