We have these in Atlanta and they don’t work. People pay as much attention to them as they did the non-variable signs, which didn’t work very well either.
I've driven through Atlanta a few times and I have to say, that's quite an experience....... moreso than Chicago IMO.
“We have these in Atlanta and they don’t work.”
We’re talking freeways with 10-16 lanes.
There’s something like a 1:100,000 ticket-to-speeder ratio.
Typical cruising speed is 80 MPH - even in a 55 zone. You’d have to be well over 90 MPH to get a cop’s attention.
Enforcing speed limits around Atlanta is practically impossible, short of the “super speeders” (actual legal term) going plainly way too fast.
If the variable-speed limit signs show lower numbers, traffic in general will naturally go slower - not because of signs, but because of conditions.