A three-vehicle pile-up along the Pan Island Expressway (PIE) caused a massive traffic jam that lasted more than an hour on Thursday afternoon.
The accident, which happened at about 2pm just before the Clementi Road exit towards Tuas, involved a trailer and two lorries.
The driver of the trailer, who only wanted to be known as Mr Safuan, 53, had jam-braked to avoid colliding with a lorry in front of him. A green lorry behind him crashed into the trailer and swerved left, injuring the driver who was alone and is in his 60s. The white lorry, driven by Mr Loo Cheng Kan, 57, collided into the green lorry and swerved right, injuring Mr Loo's passenger, who is in his 20s.
A Singapore Civil Defence Force spokesman said that the injured driver and passenger were trapped in their respective lorries. Both of them were rescued with hydraulic rescue tools and conveyed to the National University Hospital.