Roads get shut down all the time in inclement weather, even interstate highways. There are also things like 'chain advisories' which prohibit traffic of vehicl

Roads get shut down all the time in inclement weather, even interstate highways. There are also things like 'chain advisories' which prohibit traffic of vehicles unequipped with tire chains. What this looks like is generally highway patrol blocking off the road and the news of the road closures or advisories is broadcast on the radio and television (and now the Internet, I suppose.) Even down in sunny Austin Texas we have road closures when heavy rains inundate low-water crossings, though it seems every few years someone tries to make it through one and ends up drowning.