A number of years ago I was asked to write-up a government study on CPTED strategies in US cities. The results were asymmetric. Lacking political gravitas, most cities did little to implement CPTED. Arguably, it seemed like one of the greatest failures of any prevention policy in recent history (three-strikes laws notwithstanding).
I say arguably because failure is a generalization and generalizations can be a cagey thing. For example, the study also revealed some municipalities had taken major steps forward, now described in Atlas's book 21st Century Security and CPTED in a chapter titled "Implementing CPTED".
Interestingly, the government study did show one CPTED strategy proliferated - management and maintenance, what Newman called Image. That was probably because Image emulates planning trends like beautification, streetscaping, and the form-based zoning of new urbanism (a trend now at risk in places like Winter Park, Florida).
Though it cannot stop crime, it can trigger positive change. Beautification is not to be ignored. I recently took photos in San Diego and San Francisco showing how simple beautification can be. Then a Canadian CPTED colleague (and International CPTED Association board member), Steve Woolerich, sent me this fascinating clip of a street piano in his Alberta city. Check it out HERE.