Enforcement of rules in PSM

The human fears only when rules are enforced. In Singapore, I saw this sign on a pedestrian foot overbridge. Though I have used this overbridge more than 20 times, I never saw anyone breaking the law. Please observe that the sign says that the fine is 1000 Singapore dollars.

What does this have to do with process safety management? Many companies do have a carrot and stick policy towards PSM but I have also noticed that the stick is not used properly and effectively many times. Unless employees (from the top to the bottom) observe discipline in manufacturing, accidents in process industries will continue to occur!