A motorcyclist injured in a collision with a Land Rover in southern Tuggeranong on Monday afternoon remained in a serious but stable condition on Tuesday morning.
The 44-year-old man was riding a Harley Davidson when it collided with four-wheel-drive at the Tharwa Drive and Lawrence Wackett Crescent intersection in Theodore around 5pm.
The car and motorbike crashed when the Land Rover was travelling north on Lawrence Wackett Drive and turned into Tharwa Drive.
Intensive-care paramedics treated the 44-year-old man at the scene before he was taken to The Canberra Hospital in a serious condition.
The driver of the car did not require hospital treatment.
Police believe that, given the time of day, there may be other drivers or pedestrians that witnessed the collision who have not yet spoken to police.
Police are urging anyone who may have witnessed the collision or have any information that could assist police to contact Crime Stoppers on 1800 333 000, or at act.crimestoppers.com.au.