As usual, well done Sue.

The only factor I would add that most here don't have to worry about is the timing when living in a big city. If I have plenty of warning, I want to be one of the first ones out, to beat the crowd. Thus having a go bag, at least a half-tank of gas, and a destination is important.

If the mishap is unexpected, I will stay as long as possible to allow the crowd to get out first, and to allow me to plan a route that presents the least number of obstacles. I have any number of possible problems. Collapsed bridges and tunnels, civil unrest in parts of town, coastal flooding, and of course, somebody WILL break down on the BQE where it narrows down to two lanes.