Effects of Human Machine Interface Design for Intelligent speed adaptation on driving behaviour and acceptance

The project PROSPER (Project for Research On Speed adaptation Policies on European Roads) was initiated to find answers concerning efficiency, public support, and implementation of road speed management methods, particularly Intelligent Speed Adaptation (ISA) in Europe. Part of this project was to examine how Human Machine Interaction (HMI) design within ISA could affect both driving behaviour (in terms of speed choice and compensatory behaviour) and acceptance. Two separate experiments were carried in the TNO driving simulator. In the first experiment an active gas pedal was used, that increased the counter force when exceeding the speed limit. In the second experiment a tactile pedal and a dead throttle was used. In each experiment there were two ISA conditions and one control condition without ISA. This report presents the outcome of the tests and draws conclusions.