When Cedar Rapids first turned on the speed cameras it was a huge deal in the news, preview stories for days, plenty of information about where they were and how they worked.
The daughter of a guy I worked with drove I-380 through downtown back and forth pretty much every day. She also apparently wasn’t the type to pay attention to things like “news” or “local events” - so the first time she realized there were speed cameras was several days later, when she started getting a daily stream of speed-camera tickets in the mail. She was ticked off.
I had no sympathy for her, because 1) if she’d paid a smidgen of attention to the world outside her bubble she’d have heard about the cameras and 2) you had to be going at least 12 mph over the limit to get a ticket, or at least 67 in a 55.
I doubt she actually paid them all; I think the city gave people a little leeway when the program started - but still, if you’re yee-hawing through the S-curve at 70 mph or more you deserve to get fines in the mail.