Waymo car was the only thing at fault. Drivers are expected to stop to the side when they see the lights. I guess the red SUV could've slid behind the Waymo to

Waymo car was the only thing at fault. Drivers are expected to stop to the side when they see the lights. I guess the red SUV could've slid behind the Waymo to let the ambulance do the same, but it'd be unwise without the police telling you to do so, could hit a cop on foot. Silver car could go forward, but you don't squeeze in front of a U-turning car, and doing so could've made things worse for all they knew.