Falling debris hit a motorcyclist travelling along Parkes Way this morning, after a truck clipped the Commonwealth Ave bridge in the city.

The truck was travelling towards Belconnen this morning when it struck the bridge at about 8.20am.

An ACT Policing spokesman said falling debris from the bridge hit a passing motorcyclist, but the person was not injured.

Both Parkes Way and Commonwealth Bridge remained open to traffic and no roads were closed.

ACT Fire Fighters and the ACT Ambulance Service did not attend the scene.

At 9.50am police remained at the site of the collision.

They have now left the scene.