Going to work, jam. Go to lunch, jam. Go home, jam. Firstly it's because there are too many cars, because public transport sucks. Secondly the roads were not planned properly and they keep digging up the roads for some reason or the other. This brings another Malaysian driving skill, magically changing 3 lanes into 5. It takes real skill to squeeze between cars with just inches to spare. Best thing is to avoid those jams and do something else for an hour or so instead of cooking in the hot car.