Factors influencing drivers’ decision to install an electronic speed checker in the car

  • Published: Transportation Research Part F: Traffic Psychology and Behaviour, Vol 6, Issue 1, March 2003
  • Authors: J. Garvill, A. Marell, K. Westin
  • Date Added: 08 Feb 2013
  • Last Update: 08 Feb 2013
  • Format: pdf


A field study to establish attitudes to ‘electronic speed checker’ (i.e. ISA) devices, including willingness to have one installed voluntarily, and correlate these to more general attitudes to driving.


Telephone interviews with 10,300 people in the region of Umea, Sweden.

Key Findings:

  • Thirty eight per cent of subjects agreed to have an device fitted in their car.

  • Subjects viewed information devices more positively than non-over-rideable intervening systems.

  • Subjects who reported difficulty in adhering to speed limits were most positive about information only devices.

  • Drivers with a stronger moral obligation to keep to speed limits, and a strong perceived relationship between speed and risk were more willing to view devices positively.


ISA, installation, attitudes


This is a large study which helps to associate driver beliefs and attitudes with ISA installation and use. However, it is now dated and it is likely that road safety and driving attitudes have now evolved further since the study was undertaken. In addition, driving attitudes and social norms in Sweden will not necessarily map to the UK.