That umbrella isn't covering much and I wonder how well that works when you're driving down the road.

Wooden windows - on the up side they keep the rain out, sun out and protect the truck on the bad side you can't see out of them.

Looks like this is located in a desert like area so it works.  In Florida we get to much rain, your mail would be swimming!

"Replaced the window with cardboard and a drawn on wiper blade. I sure hope it don't rain anytime soon. Lol"

Well that is one way to secure your bike helmet, the only problem was that it was getting ready to pour rain.  Hope you like wet hair.

Wipers broken?  No problem just use a broom to sweep the water away.