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Mobile telephone simulator study
Swedish National Road and Transport Research Institute.
Swedish National Road and Transport Research Institute.ORCID iD: 0000-0002-1849-9722
Swedish National Road and Transport Research Institute.
Swedish National Road and Transport Research Institute.
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2004 (English)Report (Other academic)
Abstract [sv]

The study consists of four separate experiments conducted in the VTI driving

simulator. The common theme was to investigate how driver behaviour and

traffic safety are influenced when the driver attends to another technical

device while driving. The experiments were concerned with handsfree or

handheld mobile phone conversation and dialling, receiving mobile phone SMS

messages and watching a DVD film (the latter two being minor pilot

experiments). In three of the experiments (mobile phone conversation, SMS,

DVD) the participants drove a route which led through urban and rural

environments, ranging from 90 km/h rural to 50 km/h urban environments. The

urban environments differed in complexity (three levels). The driving

distance was about 70 km. The dialling experiment used a rural environment

with a speed limit of 110 km/h. The driving distance was about 15 km. In the

main experiment dealing with mobile phone conversation, a number of driving

performance measures were analysed: driving speed, variation in lateral

position, deceleration, brake reaction time, headway, time to collision, etc.

PDT (Peripheral Detection Task) was used as a measure of mental workload.

Mobile phone conversation was found demanding in terms of mental workload. It

also had effects on driving. Most effects were quite similar for the two

phone modes (handsfree, handheld). Impaired reaction time performance was

demonstrated in one of the situations for handheld mode. However, effects

were found which could be interpreted as attempts to compensate for the

increased workload caused by the mobile phone conversation: speed was reduced

(more so for handheld than for handsfree mode), and time and distance headway

increased. In spite of these compensatory behaviours, mental workload was

still markedly increased by phone use. In the SMS experiment the participants

braked later in one situation when reading the SMS message. No other effects

were found in this minor experiment. In the DVD experiment, mental workload

increased when watching the film, although this was compensated for to some

extent by the increased distance headway to a lead vehicle. No compensation

in terms of reduced driving speed, however, was apparent in this experiment.

In the dialling experiment negative effects on traffic safety were evident

from the larger variance of lateral car position during the dialling task for

the handsfree phone mode. The mental workload also increased with the

dialling task. Compensation in terms of reduced driving speed was apparent

for both phone modes. Other aspects of mobile phone use while driving still

remain to be analysed in more detail, such as starting or finishing a call,

looking for a phone number to dial, mishaps like dropping the phone, etc.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut., VTI meddelande 969A , 2004.
VTI meddelande, ISSN 0347-6049
Keyword [en]
English, Sweden, Mobile, Telephone, Driving, Simulator, Driver, Behaviour, Attention, Driving aptitude, Stress, Safety
Research subject
Road: Traffic safety and accidents, Road: Road user behaviour
URN: urn:nbn:se:vti:diva-5151OAI: diva2:673981
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2016-02-25

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Kircher, AlbertVogel, KatjaTörnros, JanBolling, AnneNilsson, LenaPatten, Christopher
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