Err, that is not the desirable statistic you seem to think it is. American drivers average ~3 trillion miles per year [1]. That means ~7000 child pedestrian injurys per year [2] would be ~1 per 430 million miles. Waymo has done on the order of 100-200 million miles autonomously. So this would be ~2-4x more injurys than the human average.
However, the child pedestrian injury rate is only a official estimate (it is possible it may be undercounting relative to highly scrutinized Waymo vehicle-miles) and is a whole US average (it might not be a comparable operational domain), but absent more precise and better information, we should default to the calculation of 2-4x the rate.
However, the child pedestrian injury rate is only a official estimate (it is possible it may be undercounting relative to highly scrutinized Waymo vehicle-miles) and is a whole US average (it might not be a comparable operational domain), but absent more precise and better information, we should default to the calculation of 2-4x the rate.
[1] https://afdc.energy.gov/data/10315
[2] https://crashstats.nhtsa.dot.gov/Api/Public/Publication/8137...