03 Section B Option 1, Key question 4 - Situational prevention, environment and punishment (part 3)

Changing criminal opportunities

Situational crime prevention changes the conditions of a particular offence so that it becomes harder, riskier or less rewarding to commit.

Right realism takes crime and victimisation seriously and favours practical controls that can reduce offending without first transforming society. New Right arguments also stress responsibility, authority and effective sanctions. These perspectives help explain the appeal of opportunity reduction and firm control, although situational techniques are used by governments with different political commitments. A lock does not have an exclusive party identity, and opportunity prevention does not require acceptance of every New Right explanation of crime.

Ronald Clarke's situational approach focuses on specific crime events. A rational choice account proposes that people respond to perceived benefits, effort and risks when choosing whether and how to offend. This need not mean a perfectly informed calculation: someone may make a hurried choice, misjudge a camera or seek excitement rather than money. Opportunity can still influence that choice. A capable guardian is someone able to protect a target; for example, an attentive member of staff can interrupt an attempted theft.

Clarke's framework is wider than locks. It includes increasing effort and risk, reducing rewards, reducing provocations and removing excuses. These mechanisms can overlap. For example, an entry system can delay an intruder and make their unusual attempt to enter more noticeable. Clarke's introduction and the ASU Centre's account of situational prevention explain this focus on the immediate situation.

Consider an original teaching example of theft from a bicycle store. Anchoring display bicycles increases the effort needed to remove one. An attentive employee increases the perceived chance of interruption. Registering identifiable components can reduce the expected resale reward. Each acts on an opportunity; none needs a longer prison sentence to operate. Surveillance can discourage an attempt through anticipated detection, help staff intervene or provide evidence afterwards. Recording an offence afterwards is useful, but it is not proof that the offence was prevented.

Opportunity measures also have limits. A determined offender may adapt, staff may be unable to watch every area, and anger or intoxication can weaken sensitivity to risk. Reducing a theft opportunity does not explain why some people seek illegal income, nor does it relieve offenders of responsibility. It addresses one part of the causal chain.

Displacement, diffusion and CCTV

A fall in crime at a protected target can represent genuine prevention, movement elsewhere or a benefit extending beyond that target.

Crime displacement occurs when an intervention redirects offending: to a different place, time, target, method or offence. If better locks in one street lead burglars to attack another, the first street benefits but the total reduction may be smaller than its local figures suggest. Displacement need not be complete. Offenders may lack the skills, access or acceptable alternatives needed to replace every blocked opportunity.

Diffusion of benefits is a reduction beyond the offences, places or times directly targeted. Clarke and Weisburd's 1994 analysis develops this argument from existing prevention cases. One proposed mechanism is uncertainty: offenders may overestimate how far surveillance reaches. A nearby unprotected target can therefore seem too risky. Their account also warns that measuring every possible form of displacement is difficult; an absence of detected movement is not proof that none occurred. Clarke and Weisburd, 1994.

CCTV, or closed-circuit television, illustrates why implementation matters. In their 2019 systematic review and meta-analysis of evaluations, Eric Piza, Brandon Welsh, David Farrington and Amanda Thomas found a modest overall association with reduced crime, with the largest and most consistent effects in car parks. Actively monitored schemes and schemes combined with other interventions had larger effects. This supports targeted use rather than a claim that any camera prevents any crime. It also leaves an attribution problem: where cameras and other measures change together, an observed reduction cannot automatically be credited to the camera alone. Piza and colleagues, 2019.

To investigate a car-park scheme, compare equal periods before and after installation, examine nearby areas for spillovers and use a comparable area outside the scheme's likely influence. If car theft was already declining across the town, a local fall could partly reflect that trend. A comparison area immediately beside the cameras may itself receive diffusion or displacement, making it a poor estimate of what would otherwise have happened. Changes in parking volume also matter: fewer thefts may follow fewer cars at risk.

Designing defensible space

Environmental crime prevention changes the design and management of places to support guardianship and discourage offending.

The environment here means the surroundings in which social interaction occurs. It does not mean green crime, which concerns environmental harm such as illegal pollution. A well-designed entrance can prevent burglary without addressing pollution, while an offence against the natural environment can occur far from a residential street.

Crime prevention through environmental design, often shortened to CPTED, connects physical arrangements to how people use a place. Clear sightlines and lighting can make activity easier to notice: this is natural surveillance when ordinary users, rather than specialist camera operators, can observe what happens. Access controls can guide entry through visible routes. Maintained shared facilities can encourage legitimate use rather than leave a space isolated. These are mechanisms to investigate, not guarantees that brighter lighting or a gate always reduces crime.

Oscar Newman's defensible space approach emphasises layouts that allow residents to recognise, use and exercise responsibility for areas around their homes. His 1996 HUD publication explains the approach through housing case studies. Clear boundaries between public, shared and private areas can make responsibility less anonymous; entrances visible from homes can make unwanted activity more noticeable. Resident involvement is central to his proposal. The account is a designer's explanation of particular projects, rather than a randomised demonstration that design alone determines crime. Newman, Creating Defensible Space, 1996.

An original teaching example is a shared courtyard reached through several concealed passages. A redesign provides a clear entrance, sightlines from occupied homes and a small garden managed by residents. The reasoning is not simply that a fence blocks entry. Repeated use can help residents recognise one another, notice damage and report it; the layout can enable informal social control, the expectations and responses of ordinary people. Formal control, such as a housing authority repairing an entry system or police responding to an offence, can support that process.

Implementation decides whether the mechanism is plausible. A visible courtyard helps little if residents cannot safely intervene or obtain a response. A neglected gate may obstruct residents while leaving determined intruders unaffected. Maintenance needs resources, and design choices need consultation with those who use the space, including disabled residents. Judging a scheme therefore requires asking who gains usable protection and who loses access, rather than treating exclusion itself as success.

Disorder and social control

Environmental approaches also ask whether visible disorder weakens people's willingness and ability to maintain public space.

Wilson and Kelling's 1982 broken windows argument proposes a sequence: unattended disorder signals weak control, fear encourages withdrawal, and declining informal control can make further offending easier. Maintaining order is intended to interrupt that sequence. Their discussion of Newark foot patrol distinguished residents' greater reassurance from a demonstrated fall in recorded crime. The article is an influential argument, not an experimental proof of every link. Wilson and Kelling, 1982.

There are several possible policy responses to disorder. Repairing damage, resolving conflicts with residents and keeping facilities usable can support shared control. Order-maintenance policing uses police activity to address disorder. Zero tolerance usually describes strict enforcement of minor rule breaches with little discretion. These responses can overlap, but they are not interchangeable: cleaning a damaged playground does not itself require arresting everyone suspected of a minor offence. Fear, observed disorder and serious crime are also different outcomes. Improvement in one does not automatically demonstrate improvement in all three.