Samenvatting
Intelligent Speed Adaptation (ISA) is one of the most promising Intelligent Transport Systems in terms of its potential impact of safety. In Finnish ISA trials the focus is on speed recording and acceleration and deceleration measurements. In the study presented in this paper, driving speed wasmeasured among taxi drivers and drivers were given 1) information about speed behaviour and speed recording system and 2) group feedback in a case of unwanted driving behaviour. In this paper the results of the effects ofthe information and group feedback are presented and discussed. For the covering abstract see ITRD E134653.