Emergency services were called to the Barton Highway, Wallaroo, near the ACT border, about 10.20am on Wednesday after four cars and a truck collided.

Police have been told a B-double truck was travelling south-east on the Barton Highway when it struck the rear of a stationary Toyota Kluger waiting at roadworks.

The impact pushed the car into three more vehicles.

The driver of the SUV - a 33-year-old woman - was trapped for some time before being freed by Fire and Rescue NSW. She was treated by paramedics for spinal and leg injuries, before being taken to Canberra Hospital in a serious but stable condition.

Three other drivers and a passenger involved were taken to Cavalry Hospital in stable conditions for further treatment.

According to NSW Ambulance, seven people were involved in the crash, including two children who escaped serious injury.

The children were taken to Canberra Hospital in a stable condition. A spokesperson said one child suffered a hip injury, while the other had bitten their tongue.

Both lanes of the Barton Highway were closed to traffic for much of the day, until the road reopened about 9pm.

Police established a crime scene and commenced an investigation into the crash.

The truck driver, a 59-year-old man, was uninjured. He was taken to hospital for mandatory testing, before being taken to Yass Police Station.

Following inquiries, he was charged with dangerous driving occasioning grievous bodily harm, drive manner dangerous, and negligent driving occasioning grievous bodily harm.

The Victorian man was granted conditional bail to appear before Yass Local Court on June 17.

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Anyone with information about or has dashcam vision of this incident is urged to contact Yass Police on 6226 9399 or Crime Stoppers on 1800 333 000.

Anyone with information about this incident is urged to contact Crime Stoppers: 1800 333 000 or https://nsw.crimestoppers.com.au. Information is treated in strict confidence. The public is reminded not to report information via NSW Police social media pages.

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