On Fri, 12 Feb 2016 12:46:32 -0600, SeaNymph
wrote:

I've always thought that many people don't understand that sometimes the
purpose of turning on your lights is not so that you can see but so
others can see you.

In south Florida, Alligator Alley (now I-75) signs tell you to turn on
lights during the day. ~80 miles straight line. Sometimes you might
see a mirage

My bride stopped once mistakenly thinking the road ended, heat rising
from the road. It happens here in the desert.