Ah, this is where mechanical engineering and civil engineering butt heads.

Are you referring to stopping distances?

Yeah, but into a road that is more narrow. You can’t fit twice the volume into a pipe half the size and expect the same throughput.

We need NHTSA to put out TV spots to get the message out, and little signs to say USE FULL LANES -ZIP MERGE IN XXX FEET

When I was growing up in the UK, Department for Transport or whomever always had TV and radio ads reminding people how to drive: take longer to look for bikes, don’t hang out next to a big lorry (truck) blind spot, don’t drink and drive, it’s hard to focus on two things at once so put your phone away while driving, etc. And they still do this. We need more of that elsewhere too.

I see what you’re driving at, but CCTV cameras are recording 24/7 on the offchance that the footage is needed, just in case, by a body who is often regulated and monitored. Whereas the concern with the glasses is that they are operated by an otherwise anonymous individual and the recording is more likely to be targeted rather than a broadly cast net.

The very reason the first camera phones had to be re-engineered to add mandatory shutter sounds to them.

What’s the difference between a tuna and a piano?