I’m from a flood prone, hurricane prone area - there were some painful lessons from Hurricane Andrew, famously the hurricane tie system for buildings in Florida which quickly spread, but in South Carolina they also learned a very important lesson - reverse all lanes on the interstate so everyone can flee as quickly as possible. The “stuck on I-26” problem no longer exists. I’ve personally driven 100+ miles in “the wrong way” to evacuate. It’s quite fun. They also perform statewide annual drills to make sure all emergency staff can faithfully execute this reversal pattern.

Do other states not do this?