I’ve never seen Red and Amber flashing alternatively. But I do recall a Red > flashing Amber > Green in Venezuela. I was told it let you get into gear so you could go as soon as it went Green. Seemed like a real bad idea to me.
I spent ~3 months driving there. Learned some bad habits, like rolling through reds (“red light is just a suggestion” I was told). My wife smacked me upside the head the first time I tried that here in the Great White North.
