Why are airport firetrucks painted yellow green? In my city, most of, if not all of the fire-trucks that serve city emergencies are red, just like this one:



But every time that I see an airport emergency that requires the fire-fighters, I see this kind of truck:



Is there a reason why the airport trucks are yellow-green and not red?
Because yellow/green has been shown to be more visible than red, especially in low light conditions.  Yellow/green is also more easily identified by people with colour blindness and other visual disorders.

It's the same reason that safety vests are yellow/green.

This article gives some good references.