I'm all for worker safety, but I'd like to see evidence that this beeping is actually an effective measure vs a less annoying sound or the use of back-up cameras??

Seriously, where is the evidence of accidents avoided? Vs other measures?

side note: had to live next to a construction site for 2 years. The beeping started in the morning at sunrise and ran for 12 hours straight.

And I'm wondering what it is like for construction workers; for the noise to provide a safety measure, they would have to pay attention to it. But that means it can't be a constant. Which it is.