Evaluation of methods for the assessment of minimum required attention


The empirical methods eye tracking while driving, visual occlusion while driving, think aloud while driving, expert judgement in the laboratory and think aloud while watching video are evaluated for their usefulness to assess driver attention in real traffic. Using a within-subjects design, six driving instructors drove three 14-kilometre-laps on a motorway per driving condition. Additional participants took part in sub-sets of the conditions. The methods were evaluated both with respect to practical implications and to the results that could be obtained with them. Glance behaviour and self-paced visual occlusion varied between different manoeuvre types (lane change – two directions, driving in left or right lane) and also between drivers. For the assessment of the attentional requirements of different traffic situations it is recommended to identify “situational prototypes” and related manoeuvres. The attention assessment should then be made with eye tracking in combination with visual occlusion, complemented with the think aloud technique. It is important to consider inter-individual variations in the process of identifying general attentional requirements for a prototypical situation/manoeuvre combination. Information about surrounding traffic needs to be obtained for a correct assessment. Preliminary results indicate that it is important to adopt a manoeuvre-oriented view, for example when identifying visual targets, instead of using a static gaze target classification scheme.



Millions for research into maritime transport and the environment

Maritime transport is a major source of emissions of harmful air pollutants and carbon dioxide. In a new project, a research team from the Swedish National Road and Transport Research Institute (VTI) and the University of Gothenburg has received SEK 6.4...


New research programme for more efficient travel

The Swedish National Road and Transport Research Institute (VTI) is playing an important role in a major new research programme to find radical solutions leading to fewer trips and more efficient travel, along with tools to enable better use of roads and...


Simulator used to practice emergency responses safely

Emergency responses of the police, ambulance, and rescue services are associated with a high risk of accidents, but practicing them in real traffic is neither safe nor permissible. A simulator-based method developed by the Swedish National Road and Transport...


Simulation of cut-in by manually driven vehicles in platooning scenarios

A study in a VTI-driving simulator has showed that a platoon will be able to handle a cut in from a manually driven car. The results of this study have recently been presented at two conferences in Japan.



The five-year anniversary of European Road Profile Users' Group (ERPUG) Forum will take place at Ramboll head quarter, Copenhagen, Denmark October 19-20, 2017.


Self-driving buses in Sweden next year?

A self-driving, fossil-free bus. This idea might become reality through a forthcoming collaborative project involving the Swedish National Road and Transport Research Institute (VTI), Linköping University and several other participants. The project group aim...