ACT Fire & Rescue and ACT Ambulance Service has responded to a road incident involving three cars, a car trailer and a horse trailer on the Barton Highway, Murrumbateman.
Paramedics assessed persons on scene with no injuries that required medical treatment.
There are significant traffic delays impacting ACT motorists, with the Barton Highway restricted in both directions.
ACT Policing would like to remind motorists to pay attention and take care when travelling interstate over the holiday period.
The incident has been handed over to NSW Police.