Just a bit off topic.
Believe it or not, people forget very quickly that they have bicycles on the roof of their car. My solution is to have 3, 4 or more 3 x 5 cards, with something scribbled on them, i.e. Bikes on Roof. Then tape them in front of the driver, rear view mirror, dashboard, windshield.
I had to learn the hard way, don't be like me.
