They do! But their speed cameras can’t establish the identity of the human who was driving, at least to a legally sufficient standard.

While I imagine it’s reasonable to assume “one vehicle per licensed driver” across much of America, that assumption seems much less reliable in NYC, where space is at an extreme premium and large families often share space. Can’t punish Mom for Dad’s speeding habit just because the car’s in her name. Plus, that doesn’t get Dad off the road!

And it doesn’t really seem cost-effective (or politically viable) to build out an elaborate appeal system to litigate which human was driving every single time. (Or to layer some kind of AI facial recognition onto the cameras. No. Bad hackers. :) )

In parts of Europe, it's a crime in and of itself to fail to identify the driver of a vehicle. Under that system, if the vehicle is registered to you, you can be charged criminally for its conduct, and even if you prove you weren't behind the wheel, you can be charged criminally for failing to identify the actual driver.

Driving isn't a game. It's the most deadly daily activity, and while I'm not sure I want Euro-style speed enforcement, it shouldn't be something that you can just shrug off, especially 30%+ over the limit in a low speed area.

You can always just target the vehicle, since the vehicle was obviously involved.

Except in cases where the vehicle was stolen, then it was driven by one of the owners or by someone the owners permitted to drive the car. Either way, the owners are responsible on some level. Maybe not to the level of jail, but certainly to the level of paying off fines (initially), and eventually having the car seized (if the number of tickets is extremely high, as in this case).