I thought V2V was going to use redundant, multi-media, communications - such as modulating a car’s lights’ LED PWM to provide a low-bandwidth signal to other ca

I thought V2V was going to use redundant, multi-media, communications - such as modulating a car’s lights’ LED PWM to provide a low-bandwidth signal to other cars within line-of-sight, while also using some analogue of Bluetooth and Wi-Fi for longe-range communications.