There's more discussion of that video on selfDrivingCars subreddit (including comments from Kevin Chen who shot the video) [0]. The turn indicators use PWM'ed

There's more discussion of that video on selfDrivingCars subreddit (including comments from Kevin Chen who shot the video) [0]. The turn indicators use PWM'ed LEDs and can be invisible in daylight with fast enough shutter speed on the camera. [0] https://old.reddit.com/r/SelfDrivingCars/comments/18myjc6/driverless_waymo_cuts_off_another_driverless_waymo/ https://old.reddit.com/r/SelfDrivingCars/comments/18myjc6/dr...