There are techniques for reducing the effects of active sensor interference, for example: http://www.cs.cmu.edu/~motionplanning/papers/sbp_papers/integrated3/k

There are techniques for reducing the effects of active sensor interference, for example: http://www.cs.cmu.edu/~motionplanning/papers/sbp_papers/integrated3/kleeman_sonar_reject.pdf http://www.cs.cmu.edu/~motionplanning/papers/sbp_papers/inte... As long as the usable sensor density is higher than how tightly we can pack these vehicles, then we're probably OK.