I live 250 yards from an oil refinery. When a cracking tower blew, roads turned into a mess. It took one hour to cover the last two miles home in my truck. I can walk faster than that. I learned that a bicycle is a great evacuation vehicle. I prefer the bicycle since it requires less maintainence than a motorcycle, and I use it more. I don't trust any device for an emergency that I do not use on a regular basis.