Check roads' plow status online
Heavy traffic is making it difficult for snowplows to make progress, but they're out there nonetheless.
Several local governments have online tools that let you monitor the status of snowplows in real time, so you can make the best decisions about going out. These are powerful and new tools; you can browse on maps or enter an address, and in some cases check live traffic cameras.
Alexandria (You can see which roads are prioritized and report problems, but no live status)