Imagine driving down the interstate as the sky turns dark. You come over a hill and see a tornado ahead of you. What do you do?
Back in 1991, a group of people escaped injury by hiding under a bridge overpass and it was caught on camera. Unfortunately, this led people to believe they were doing the right thing.
So where should you go during a tornado when no safe shelter is present? Looking back at #2, you can start think about places that are as low as possible. Underneath concrete tubes/culverts that go under the highway are the best places if you're away from a reinforced building. Staying in your vehicle is not a safe option, even with some arguments in the past few years suggesting it so.
-Meteorologist Eric Sorensen