I'm curious as to how this speedy, uncontrolled traffic will mesh with pedestrians and cyclists. 

This is something the self-driving car fans seems to forget - in that the needs of self driving cars (which is basically just a modified version of now obsolete 1950s era autocentric planning) directly conflict with what's actually happening in cities and many suburbs. Meanwhile, the benefit of self-driving cars falls off dramatically in uncongested rural areas where driving IS the only way around, other than the perennial issue of getting Uncle Frank home from the bar.