Limiting speed through telematics : towards an Intelligent Speed Adaptor (ISA)

Reports on a study on the effects of a prototype intelligent speed adaptor (ISA) in actual traffic within the framework of the project 'Automatisering Rijtaak'. Twenty-four subjects were included in a test of effects of feedback on speed behaviour, mental workload and acceptance. Subjects drove an instrumented vehicle in normal traffic on various types of roads with different speed restrictions and in a driving simulator, interacting with other traffic as well as under different speed restrictions, with and without feedback.