The Effects of Active Accelerator in Cars - Results from a Large Scale Trial with Intelligent Speed Adaptation
M Hjälmdahl, C Hydén, A Várhelyi and S Almqvist, Lund University, SE
The Effects of Active Accelerator in Cars were studied in a large scale trial with Intelligent Speed Adaptation (ISA) in urban areas. During a period of 6-10 months, 225 cars were equipped with the system consisting of an active accelerator, a digital map with all the speed limits within the city limit, a GPS system and data logging facilities. The active gas pedal provides drivers with counter-force whenever they try to exceed the pre-set speed limit. An extensive evaluation was carried out in order tostudy driver behaviour, acceptance and effects on safety, travel time and the environment. In order to be able to observe any attitude changes in the city, surveys with 750 citizens were carried out before the start of the project and after the project. In order to study driver reactions and behaviour, in-car observations were carried out. In order to see any changes in the attitude and acceptance of the test drivers, they were interviewed when recruited, during the test drives and after the trial. A number of drivers were asked to fill in a diary every day on their driving. Driving data was logged in the test cars and speed profiles, gas pedal activity, travel time and exhaust emissions were analysed. In order to measure possible system effects, a number of studies were carried out in the field: traffic counting, speed measurements, observations of interactions between road-users, observation of frequency in driving against red. Similar studies were carried out in a control city in order to be able to see if possiblechanges in Lund are due to the ISA-equipped cars. The results will be presented in the final paper.
Association for European Transport