Unless you’re transporting car batteries. You can have a full truckload of car batteries and not one placard in sight if your company files the right paperwork. Dad drove for Johnson Controls Globe Battery division for years, always ran corrosive placs. Ryan leasing comes in and company does away with company drivers. Ruan runs out day one unplacarded. Big stink was made by displaced company drivers who were UAW. Long story short, turns out to be perfectly legal to run wet cell car batteries with no placs under federal refs if company files proper paperwork with feds. So much for the “communicate the risk”intent. How’d you like to walk up to a rolled over truckload of car batteries just beginning to burn as a first responder with no idea what you’re walking into.