The collision happened in O'Connor at the intersection of Barry Drive and Dryandra Drive around 8.50am on Tuesday.

Two people were treated at the scene by paramedics, and one person was taken to hospital in a stable condition.

An ACT Emergency Services Agency spokeswoman said fire and rescue crews are on the scene.

City-bound traffic was heavily affected as a result of the collision.

The traffic was cleared shortly after 10am.