You generally don't leave disaster areas at highway speeds. Electrics should be better at this if you don't run the tunes or the ac. Also there are a lot of disasters that will be bigger than 200m. If Rainier goes off it will have a very large ash spread mostly east depending on prevailing winds. Seattle was just blanketed by smoke from way up in bc all the way to Portland. Way more than 200 miles. Imagine if it was a foot + of air intake clogging ash and low visibility.