Assume your personal device has a "Pedestrian" mode. When turned on, it will broadcast your position and velocity 10 times per second (a "Basic Safety Message"

Assume your personal device has a "Pedestrian" mode. When turned on, it will broadcast your position and velocity 10 times per second (a "Basic Safety Message", https://www.its.dot.gov/itspac/october2012/PDF/data_availability.pdf https://www.its.dot.gov/itspac/october2012/PDF/data_availabi...) The safety message will be detected by all nearby autonomous vehicles, giving them a chance to slow down or stop while you cross. That's the theory, anyway.