Was traveling along the CTE towards Ang Mo Kio yesterday evening at around 645pm at the third lane, i.e extreme left lane.
The second car in front of me, a greenish silver BMW E90 with SGJ plate suddenly emitted a lot of white smoke from his exhaust and the effect was almost like a smoke bomb, enough to decrease visibility to almost zero across 3 lanes.
The car in front me braked suddenly and I almost crashed into him, the thick white smoke also almost cause a chain collision on my right.
Not angry or anything, but I hope the BMW driver's vehicle is ok and not too expensive to fix. The amount of white smoke emitted is really scary!