I also have thought about AIR horns. I drove for 45 yrs over the road. I didnt use them that much but they were always there in case I needed them. Big trucks are required to have both air and electric horns. I think they would be extremely valuable in todays society. because of all the distracted drivers on CELL PHONES and TEXTING and not paying attention to the job at hand with is DRIVING. I dont use my horn sometimes to warn others who I am trying to pass and seem to want thier half out of my lane. I do however use my horn sparingly so as not to cause someone to go into ROAD RAGE.
I think I have a pair of Plastic Horns and a compressor in the barn that came off my fathers MH. Ill have to look in da barn when I get the airstream out.
Roger & MaryLou
F350 CREWCAB SW LONG BED
7.3 liter Power Stroke Diesel
1977 27ft OVERLANDER
AIR # 22336 TAC- OH-7
May your roads be straight and smooth and may you always have a tailwind!