Key Performance Indicators (KPIs) may concern any of the steps of the penal procedure that constitutes enforcement of traffic regulations. Available data on relevant procedures and results vary widely among EU Member States. In order to select appropriate and useful KPIs on traffic enforcement, key road safety problems in each country should be considered and focus should be on particular road safety offences, groups of road users or types of roads that relate to these key problems. This paper describes the framework for the selection and the results of the pilot application of appropriate KPIs on enforcement of traffic regulations within the Trendline research project. Selected KPIs, concerned:

–  the number of police controls/violation/population

–  the number of tickets /violation/population

–  the number of urban red light cameras/ network km or population or population/km2

–  the number of fixed speed cameras or section control stretches per km of network or population or population/km2.

Pilot KPIs in three countries revealed that close cooperation with the Traffic Police and other authorities is needed to obtain data on enforcement procedures and results not freely available. Specific traffic violations seem of more interest e.g. speeding and drink-driving. Different approaches concerning driver awareness about enforcement actions were also identified.