You need to be on the road in minutes. Packed. gone.
Because everyone else who thinks they need to flee are also doing the same thing.
You have to be prepared to beat them out onto the road.
If you missed the first alert, you may want to hunker down and wait.
Yes, even if a person does get "stuck" because of procrastinating or "living in denial", there is always a way, all it takes is a lot of will power and determination.
However, when looking at this "peace time" traffic jam, it is undeniable that the current highways simply can't handle the numbers in a "good" aka "holiday" situation, let alone a "bad" aka SHTF situation.