Assessment of “LAVIA” speed adaptation systems: experimental design and initial results on system use and speed behaviour

  • Published: Proceedings of the 13th ITS World Congress, London, 2006
  • Authors: J. Ehrlich, F.Saad, S. Lassarre, and S. Romon
  • Date Added: 08 Feb 2013
  • Last Update: 08 Feb 2013

Objectives: Evaluation results

Methodology: Attitudes survey and real-world trial in France with 90 drivers comparing advisory to intervening ISA.

Key Findings:

  • The system was triggered on every type of road, but this occurred more frequently on urban roads than on n-class rural roads and motorways.

  • The system was overall very reliable, provided map-matching could be accomplished.

  • Advisory ISA reduced speeding for almost all speed limits (the exception was on 45 km/h roads), but it was substantially less effective than both the forms of intervening ISA tested.

  • Advisory ISA reduced the amount of time spent speeding by 10.5 per cent overall but there was a reduction of only 3 per cent on 50 km/h urban roads.


Intelligent Speed Adaptation


Results appear to be applicable to the UK.

Report not available online