Police are asking witnesses to come forward following a series of car crashes on Tuggeranong Parkway near the Cotter Road overpass on May 19.
ACT Policing said a wheel came loose from a car and landed in the northbound lanes at about 6.45am.
Drivers tried to avoid the wheel, causing a nine-vehicle crash at the end of the Cotter Road on-ramp heading north.
A further eight vehicles had separate incidents near the fixed speed cameras in both north and southbound lanes, as some drivers became distracted by the initial crash.
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"Extensive traffic delays ensued. Thankfully no injuries occurred," police said.
ACT Policing are seeking witnesses and dash-cam footage from any vehicle driving near the collisions between 6am and 8am that morning.
"[We] are seeking drivers who witnessed the first collision (who have not already spoken to police) to come forward," they said in a statement.
"Anyone who has dash-cam footage is asked to please save it and contact Crime Stoppers on 1800 333 000. Please quote reference 7113252."
