The sensors are not fully integrated to the existing OEM design, still retro-fitted sensor prototypes. They are still figuring out the optimum sensor numbers, sweeps, heights and clearances. Most early iconic sign is that centrally located 50's 'beanie' police light-style spinning 360 degree LIDAR unit. Still at highest position. they could make it lower profile and/or have overlapping units (most expensive sensor).
http://www.autos.ca/wp-content/uploa...s-1024x621.jpg
https://www.wired.com/wp-content/upl...o-1024x576.jpg
Almost...