Repository hosted by TU Delft Library

Home · Contact · About · Disclaimer ·

HMI and Safety-Related Driver Performance

Publication files not online:

Author: Östlund, J. · Nilsson, L. · Carsten, O. · Merat, N. · Jamson, H. · Jamson, S. · Mouta, S. · Carvalhais, J. · Santos, J · Anttila, V. · Sandberg, H. · Luoma, J. · Waard, D. de · Brookhuis, K. · Johansson, E. · Engström, J. · Victor, T. · Harbluk, J. · Janssen, W. · Brouwer, R.
Institution: Institute for transport studies
Haste delieverable 2
Identifier: 19361
Keywords: Traffic · traffic safety · in-vehicle information systems · human-computer interaction · man-machine interface · driver behaviour


The aim of HASTE is to develop methodologies and guidelines for the assessment of In-Vehicle Information Systems (IVIS). The intention is to devise an assessment regime that is independent of the design of an IVIS and that is based on an evaluation of driving performance while using the system as compared with driving performance when not using the system (baseline driving). The ambition is to provide an assessment regime which: • Is technology-independent; • Has safety-related criteria; • Is cost effective; • Is appropriate for any system design; and • Is validated through real-world testing. The objective of the experiments in this Workpackage (WP2) was to investigate the impact of IVIS task load on driving performance and safety. To achieve this, two surrogate IVISs (SIVISs) were created, one representing cognitive load and the other visual load. Using these SIVISs, it was possible to vary secondary task load systematically. Separate assessments of the effects on driving of the different types of task load were carried out, with as clean a distinction as possible between visual and cognitive load. The objective was also to identify the advantages and disadvantages of the different assessment methods (laboratory, simulator, field), and finally to identify which road types and scenarios are the most productive for testing IVIS. Different groups of drivers were used and scenarios varied in accordance with the protocol and procedure for safety assessment of IVIS as outlined in Deliverable 1 (Roskam et al., 2002). A very large set of experiments was conducted. But in one sense this was one very large multi-national unified and integrated experiment with a common goal, a common experimental protocol and common indicators. The effect of IVIS use in three distinct road categories — urban, rural, and motorway — was investigated. To do this, a total of 14 separate driving simulator experiments were conducted, with each participant experiencing only one type of S-IVIS. All seven driving simulators were used to investigate driving with both S-IVISs on a common rural road. For the most part, each simulator road type had three levels of difficultly with the most difficult being driving when some critical event was triggered (the motorway had only two levels of difficulty: without and with events).