Understanding Behavioural Patterns of Interlocked Offenders to Inform the Efficient and Effective Implementation of Interlock Programs: How Offenders on an Interlock Learn to Comply

In a growing number of jurisdictions around the world an increased demand for the use of alcohol interlocks is evident. In order to inform decision-making regarding the use of interlocks in programs it is crucial that program administrators and practitioners understand behavioural patterns of offenders on an interlock. Insight into compliance rates of interlocked offenders throughout their time on the interlock can guide administrators with regard to program development and implementation, particularly in relation to logistical aspects of programs and the requisite resources to support it. The objectives of this study are to shed light on the behavioural patterns of offenders on an interlock, specifically with respect to their compliance with device requirements and program rules and to illustrate how such knowledge can be used to inform the implementation and delivery of interlock programs. This study was conducted for the Dutch Ministry of Transport to provide empirical information needed to inform the implementation of the Dutch interlock program. The sample used in this study consists of 7,743 interlocked offenders who were randomly drawn from a population of 30,000 offenders who had an interlock installed during a time period of up to three years, more precisely at some point between 2006 and 2008. her research are formulated.