I'm always on the road, and I drive rental cars. Sometimes I...

I'm always on the road, and I drive rental cars. Sometimes I don't know what's going on with the car, and I'll drive for ten miles with the emergency brake on. That doesn't say a lot for me, but it doesn't say a lot for the emergency brake. What kind of emergency is this? I need to not stop now. It's not really an emergency brake, it's an emergency make-the-car-smell-funny lever.