The reasoning was that a study revealed collisions at 25 MPH were significantly less likely to avoid in a car accident fatality.
The problem here is that no one is moving at the speed limit. No police officer (in NYC) is going to write someone for just a few miles an hour over the limit because that's just ridiculous and much more prone to being beaten in court. Personally, I don't bother unless it's at least 15 over and when I did traffic enforcement on the limited access roadways I didn't write anything except 20+ over.
If the then-existing speed limit was strictly enforced by targeting the worst offenders the beneficial effect would be felt without a need to reduce the speed limit by 5 mph.
"Vision Zero" should be more focused on targeting aggressive and dangerous drivers, of which there are plenty.
Unfortunately this is probably very true. I had my own experience with one of the ALJs at the Queens South DMV. Speaking to some of the traffic attorneys at the DMV (there is a little bullpen for lawyers)...
Ah, yes. I spent many hours in Queens South butting heads with Jay Gelman who, at the time, was one of the few attorneys there.
But honestly, (and I realize my perspective is different than yours) I found most ALJs fair in that if the officer missed one of his points the motorist would be found not guilty. Of course, once an officer gets to the point where he knows what to say and covers what he needs to, losses are very rare.
There were times when I'd walk in with a motorist who I had written 5 or 6 well-deserved summonses to and left losing a few - even though my testimony was perfect. I'm not talking about petty stuff but serious aggressive infractions.
In all the TVB offices I've testified in I would say there were only two ALJs in the city who would find a motorist guilty of 5 or 6 infractions if the officer testified correctly for each - Judge Fuchs in Queens South and the infamous Judge Levine in Staten Island.
I know motorists see the system as being stacked against them, but very many police officers see it as a system biased against them.