Cameras drastically curb speeding at San Francisco's most dangerous intersections

We have a bunch around Chicago too. There are two zones around where I live that have them, and in both places people absolutely do slow down now. There might be a catch-22 for the city in terms of on-going revenue though—once people learn to slow down in those areas, I would imagine ticket revenue from those cameras drop. But saving lives is never a bad outcome.

That's impressive!
And unexpected