In my city there was a photo radar set up at a construction site that issued 10 tickets to the same vehicle over a period of 2 weeks all before the driver recieved the first ticket in the mail. How does that improve road safety (assuming that actually the intent of photo radar)?

So, one unique example where it took 2 weeks to have an effect is enough to say that they don’t work? While there are studies available through a simple word search that show the opposite? I’m confused here, but perhaps I misunderstood that 2nd paragraph.