If worse comes to worst, when the roads are screwed, most people will forget an obvious alternate "road" - the railroad! I'm not talking about driving on the rail part or over the railroad ties (good way to shake yourself to death!), but rather in the right of way alongside the tracks. For those with trucks or SUVs it might be a good way to get across town or even out of town. You might have to actually straddle the rails at some point in order to drive across a bridge, though. Be warned that as soon as everybody sees you do it, you will have lots of followers!