Girl, 13, hit crossing Sydney road

A Sydney teenager has been taken to hospital with critical head injuries after she was hit while trying to cross a busy northern beaches road.

A teenage girl has been placed in a coma after she was hit by a car near Dee Why, on Sydney's northern beaches.

The CareFlight helicopter, police and paramedics rushed to help the unconscious 13-year-old after she was hit while trying to cross Warringah Road at Narraweena on Saturday night.

CareFlight director Ian Badham said helicopter operators wearing night vision goggles had to land at a nearby oval.

The Mona Vale girl was placed in an induced coma and onto a ventilator as she was flown to Royal North Shore Hospital, where she arrived in a critical condition.