"She was very confused, she was bleeding everywhere."
The crash had been horrific, Kado said.
He thought the woman had hit a glancing, head-on blow with the oncoming truck that sent her flying from the road and left a trail of debris behind.
"The car was in bits and pieces, the door had flown, everything was in different areas," he said.
"You would see 100m down the road the car's mirror and then the headlights were somewhere else."
Up to five fire trucks and four ambulances were quickly on the scene along with other passing motorists. But reaching the woman wasn't easy, Kado said.
Rescue teams had to climb down through the bushes and there was some flooding underneath the car because of the rain.
The woman was also frantically calling for her boyfriend.
"She was screaming and saying she had her boyfriend with her and none of us knew if she really did or not," Kado said.
He said the car's windscreen had broken, meaning it might have been possible for a person to have been thrown from the car during the crash.
Kado remained an hour at the scene and rescue teams were still searching for the woman's boyfriend when he left.
However, police have since confirmed only one person was hurt in the crash.
The driver of the truck that collided with the car was uninjured but shaken.
"He was very shocked, he was shaking and scared about what had happened."
Kado said seeing such a horrific crash had served as a reminder to him to always remain calm and think clearly before overtaking on the roads.
"I used to overtake frequently, and I probably have to stop doing that now after what I saw," he said.