I spent more than a little time driving in Puglia (southern Italy) in the past few weeks. I was (as best I can tell) successful in avoiding any active ZTLs (I did enter a few of ZTLs: one, during hours it clearly stated it was NOT active and was "open"; and a couple others under the supervision of, and with instructions from, my accommodations - they took photos of our license plate and entered it with the city to "bless" our being there).
I'm pretty sure we will not get any ZTL fines next year. I'm a bit less confident about speeding tickets.
I drove a lot on the autostradas. I was always watching for signs indicating speed being "electronically controlled" and almost always downshifted and slowed to be sure I was below the posted speed limits. It's possible I missed it by half a minute here and there, as the signs posting lower speeds popped up (with impossibly slow speeds) in places where the traffic was all going 2X that posted speed. I did notice that there were lots and lots of signs warning that speed was "electronically controlled" but just a small number of signs showing the "camera" symbol and more explicit warnings about speed cameras (I took those more seriously slowed down quickly for them). I did spot a few of the threatened cameras but sometimes I only saw the signs. The third classification of speed camera warnings carried a more ominous term - something that translated to "speed tutorial" - I took this to mean "we're looking for someone to teach a lesson" so I tried not to get schooled.
It seemed like only tourists reacted to these signs and took them seriously. All the German-manufactured cars with "D" license plates just blew through at 2X or 3X the posted speeds (kind of reminded me of drivers at home - I guess BMW and Audi owners drive at predictable speeds worldwide...).
I was pretty good about driving at or below the speed limits, especially when there were clear warning signs. But I'll admit there were places where the posted speed limit just seemed absolutely absurd: eg imagine a US Interstate Highway (or something like it), obviously built for high speed and limited access - but with a speed limit posted in the range 40-50 km/hr (roughly 25-30 mph). The German cars were blowing past me routinely at 120-160 km/hr and occasionally much faster, like I was standing still. This was not in a construction zone, not in a city, conditions appeared perfect. I was clearly annoying other drivers and honestly, the speed difference was so great I was creating a hazard. I figured if they were shooting past me at over 110 km/hr, they must have known that there were no cameras nearby, so sometimes I just shrugged and wound up to 80, 90 or 100 km/hr and crossed my fingers.
I guess I am going on faith - and "the wisdom of crowds" (or at least the preference of BMW drivers to avoid expensive speeding tickets). Hoping I don't get a ticket next year. If I do, maybe I should forward it to some BMW or Audi owners' association.