I’ve always wondered. The reigning theory as a kid was so that planes could see the line and not fly into it. In adulthood, we realized: planes really don’t fly that low ever.
In: Physics
Not sure about mountains, but where I am from they are in fact used for airplanes! Many people use planes to crop dust their fields and use highways as run ways so these are present to make sure they use the right highway.
Latest Answers