Any individual change like that might not have a significant impact, but as part of a range of reforms etc. it's not so hard to believe moving (or better monitoring of) bus stops and other similar public amenities could increase community safety (which may just mean criminals resort to interacting less with the public and more with other criminals, but that's still an improvement). And as part of that at least some criminals may see it as an opportunity to change directions in their lives. Do you have a better idea?