Old Question Asked Yet Again

On trucks? Trailers? Horse drawn carriages? ;)

Rear windows on what? Their SUV, Truck, Travel trailer, Class A, Class C or Class B?

I haven't noticed people driving with their windows open on anything.

MM.

Ok ok. On Class A and C, some trailers.

ventilation? forgetfulness?

Ok - we are seeing more folks posting odd questions with the context left open. Why, please?

follow it and wait for the money to fly out

OK Put a little more time into your posts, tonijim. Who, what, when, where, why, how....

Let the bad rear end smell out.

OP do you leave your windows open......NO, then why not :H

I drive with the windows open on our 96 Southwind. Sometimes all windows, sometimes just the back windows. With the back windows open I get ventilation with less noise.
But, that's just me. I can't speak for others.