SINGAPORE - Twelve vehicles were involved in an accident on Tuesday evening, on the Kranji Expressway near the Woodlands Road exit.
According to eyewitness Winnie Chuah, a fast-moving truck hit several barriers and a tree.
The tree fell onto a car, and the truck then barrelled into several other vehicles.
According to the Singapore Police Force, seven cars, three lorries, a taxi and a van were involved in the accident.
The multi-vehicle collision resulted in congestion up to the Choa Chu Kang Way exit.
Two people, aged 63 and 34, were taken to Khoo Teck Puat Hospital. The police are investigating.
The YouTube video below shows the incident as it happened.
The driver who captured the video on his dashboard camera, HR manager Johnson Anthony, 34, said the experience was "horrifying".
He was on his way to dinner with a friend and had stopped at the traffic light.
"We were chatting when I heard a loud noise - boom, boom, boom," said Mr Anthony. "I was wondering what it was and I turned behind to see the crane plowing towards us, bashing through the trees."
"The impact was crazy. It took us totally off-guard. I still have trouble sleeping, and keep thinking about the accident and how close it had been."
Police say investigations are ongoing.
The crane is believed to be owned by crane rental company Hiap Tong Corporation. When contacted, General manager Lawrence Tay declined to comment.
"We cannot divulge anything as police investigations are ongoing," he said.