And that's people who have experience in this stuff. The last 20 miles to the airport took nearly 2 hours (that's how far away we were when the ice started).
Through several miracles, we caught the last flight out--we'd barely gotten into the air when the flight attendants told us they'd just closed the airport.
Digging my car out at the airport last night was not so good. Luckily, they had a truck that came a few minutes after I called for assistance, and they cleared out the couple of feet of snow piled up behind and around my car (I got the ice that encased it off).