Two separate collisions approximately 1 kilometre apart that occurred on Tuggeranong Parkway on Tuesday night are almost cleared, ACT Policing said.
One collision occurred before the Arboretum while another is just after the Arboretum.
The collision before the Arboretum is now clear and the one after should almost be clear within the next half hour.
No deaths or fatalities occurred, and both incidents involved rear ended car collisions.
Police have urged people to drive according to wet weather conditions, leaving plenty of space between the vehicles in front and taking a slower approach to the road.
ACT Policing confirmed the two collisions were both heading northbound, previously making traffic bank up past Cotter Road.