[dfxm12]

accompanied by much stricter enforcement

This is the crux of the matter. If people really thought they'd get a speeding ticket, perhaps they wouldn't speed. I live in a big city similar to Boston and I've never seen someone pulled over for speeding though. After all, what are the odds that:

1. A car speeds

2. In front of a cop

3. The cop can safely pursue the speeding vehicle in city traffic

[afcwebdesign]

Roads need to be redesigned so that going fast feels dangerous. Until then, there's no way to enforce it enough to actually change driver behavior. The US loves its wide roads that you can feel comfortable doing 80 on... until it starts to build narrow little shared streets people won't slow down.

[randcraw]

That's why in my area (outside Philly) speedtraps require at least two cops: one to gun you down and a second 100 feet down the road to wave you over.