You see a coworker doing something that violates safety procedures (e.g., reaching into machinery, not wearing required PPE, ignoring vehicle safety). What should you do?

Safety culture is heavily emphasized at USPS — workers compensation claims for injuries are a major operational issue, and the 474 screens for candidates who participate in a safety culture. The right approach: (1) raise it directly with the coworker — most safety issues are oversight, not defiance; (2) escalate to supervisor if it continues or is serious; (3) recognize that letting unsafe behavior continue endangers everyone including bystanders and customers. 'Mind your own business' fails because safety isn't personal business — it's collective. 'Waiting for them to get hurt' is the worst answer — it makes you complicit. 'Recording them for proof' is unhelpful and adversarial. The pattern: speak up + escalate appropriately + treat safety as shared responsibility.