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18/1/2018

BIPOLAR CPTED - INCLUSION OR EXCLUSION?

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Picture
Access controls with lavender - CPTED can be beautiful

​by Gregory Saville

Reflecting on Tarah's excellent blog last week on the need for access control in public housing, I came across an article I wrote a few years ago that adds another dimension to the access control story. I thought I’d share…

CPTED is inclusive, but only if it is used to help residents socialize and take ownership of their common spaces. If not, the results are like the sugar-sweet candy bar; it tastes yummy and satisfies children, but if overused it leads to heart disease and, when the sugar kicks in, the kids go nuts. 

How does it work? CPTED reduces crime by dividing the public realm into semi-public and semi-private spaces. For example, architects design a landscaped courtyard in front of an apartment building entranceway so residents feel that space belongs to them. But CPTED can also exclude some groups. 
Picture
Access control fencing around hotel Is it needed? What's the crime like outside the fence?

Developers use access control to build exclusive gated communities to keep outsiders away from wealthy, enclosed residential areas. Or the tactic called target hardening might use reinforced bullet-proof windows in bank teller areas to deter robbers. But that can also create a psychological barrier between legitimate customers and make it difficult for tellers to provide a more personal service and get to know their customers.


INSIDE OR OUTSIDE?

Sometimes CPTED can have both inclusionary and exclusionary impact. For example, back in the 1980s and 1990s, Los Angeles and Dayton, Ohio barricaded selected road entrances into high crime neighborhoods to cut drive-by shooting and drug dealing. Shootings and drug activity did decrease, at least initially. But later crime increased as criminals adapted to the barricades. Furthermore, residents complained about being more isolated, the inconvenience of the barriers, the traffic impact on nearby neighborhoods. Worse still, in Los Angeles they complained about not being invited to participate in planning.
Picture
Inclusionary public plaza in Europe - No fences required

Clearly, CPTED has a bipolar nature – inclusion vs exclusion. The devil truly is in the details! As Jacobs said in Death and Life of Great American Cities: “The first thing to understand is that the public peace …of cities is not kept primarily by the police, necessary as they are. It is kept primarily by an intricate, almost unconscious network of voluntary controls and standards among the people themselves, and enforced by the people themselves.”


BEWARE OF THE EXCLUSIONARY TRIGGERS

Beware of these exclusionary triggers:

  • CPTED checklists that list details for design. Some details can help, for example, lighting. But not always. Lighting research is inconclusive! In some cases, increased lighting can attract unwanted activity, or make it easier for drug dealers to see oncoming police. Therefore lighting may cause more harm than good. It may be necessary to turn lights out to cut crime. A better alternative to checklists is CPTED guidelines with examples and photos of positive designs, and requirements for a proper risk assessment prior to CPTED tactics.
  • CPTED that controls access, such as fencing around property, but doesn’t provide alternatives for socialization. For example, when children walk down residential streets lined with chain link fences they learn they are outsiders in their own neighborhood. Children need inclusive, semi-public play areas near where they live to feel they belong.
  • CPTED courses that teach students design tactics but ignore, or pay minimal attention, to 2nd Generation CPTED. That is where exclusionary errors begin!

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  • HOME
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    • SUMMITS & SEARCH CONFERENCES
  • ABOUT SAFEGROWTH
    • SafeGrowth History
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    • What makes great neighborhoods
  • RESOURCES
    • TED-Ed tutorials >
      • SafeGrowth - Crime & the 21st Century City
      • Vision-Based Asset Mapping
    • SafeGrowth language
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  • TOOLKIT (PASSWORD ACCESS)
    • Notes for SafeGrowth teams >
      • PORTLAND - TriMet (2022)
    • RISK ASSESSMENT FOR NEIGHBORHOODS >
      • RA Categories-Neighborhoods
      • 5 Steps & Report guidance >
        • Report structure
        • Sample reports
      • Readings for download
      • Glossary
    • RISK ASSESSMENT FOR REGULATORS >
      • RA Categories-Regulators