Pedestrians hit at Sydney crossing

A car that ploughed into three pedestrians at a Sydney intersection, leaving a young woman critically injured, may have run a red light.

The 21-year-old woman suffered severe head injuries and is in Westmead Hospital while two men have also been taken to hospital - one with a possible broken pelvis and the other with head injuries.

"We believe, at this stage, the pedestrians had a green light to walk," Acting Inspector Brett Samuel told reporters at the Traffic and Highway Patrol Command on Saturday afternoon.

"It's not very nice, that's for sure."

A man who was allegedly behind the wheel of the car will be interviewed by police.

No charges have yet been laid against the 35-year-old, who was uninjured following the Saturday night collision at Strathfield in Sydney's inner west.

Police are investigating whether the driver went through a red light before the crash.