Originally Posted by
tjspiel
Bridges do ice up easier (most of them not even over open water in the winter) but I'm not talking about bridges. Yes hot air rises, eventually - if there is no force moving it any other way.
Exhaust is often directed down.
Look. This is known phenomena. Not an urban legend or something we are making up.
Here is the reason why they don't make many V8s anymore, and why they started making hybrid and electric cars...all in the name of safety during winter time. Less exhaust gasses = less black ice. How clever is that?
You can't have small engines in semi trucks, that's why their exhaust pipes are pointing up - simple fix, but that's also the reason why bridges and overpasses are always full of black ice first... Nothing is perfect I guess.
[MENTION=21724]cyccommute[/MENTION] You are one of my favorite posters here, but I'm so dissapointed you didn't know that exhaust story. Nobody is perfect I guess...