I noticed this in the Middle East too. The horn is used just to announce your presence so they know to look out for you. It's an interesting cultural quirk. It

I noticed this in the Middle East too. The horn is used just to announce your presence so they know to look out for you. It's an interesting cultural quirk. It was also common to flash your lights when you're changing lanes on the highway to pass someone, which is considered rude in the US as well.