Re: Sudden Impact
Agreed. For people who can't picture the numbers of it:
I'm middle-aged, tall, and not very fit. I weigh about 90kg, and if I run (I try not to, it's undignified), I top out at about 15 km/h.
If I run into someone at my top speed, they're going flying, and probably getting at least mildly hurt. (And I'm nowhere near the top percentiles of weight or speed.)
Currently, your average delivery robot is about 25kg. One that can get up to a bot+freight weight of 500kg will be significantly larger (unless it exclusively delivers gold bullion) than the ones we see around now, so let's double that to 50kg.
A robot, carrying 5 of me, going as fast as I can run, does not belong on the pavement.