Resarch areas

Fatigue at sea – A field study in Swedish shipping

Year:
2007
VTI-code:
R586A

Authors: Mats Gillberg , Albert Kircher , Margareta Lützhöft , Birgitta Thorslund

The purpose of this study was to collect data about the fatigue level of bridge watch keepers to use for revising earlier sleep models, and devise innovative solutions for the shipping industry.

Data collection included interviews with shipping companies and a field study onboard 13 cargo vessels. 32 participants took part in representing two watch systems; 2-watch and 3-watch. Subjective sleepiness and stress estimations were performed once every hour. EOG was used to record eye movement behaviour. Reaction time test was made to examine performance.

3-watch ...

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Research area

People in the transport system

  • Published: 2007-09-28
  • VTI-code: R586A

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Older participants in driving simulator studies – A literature review

Year:
2007
VTI-code:
R581

Authors: Per Henriksson

This research overview deals with simulator studies involving older participants, of about 65 years of age or older. The overview has been structured in accordance with the aims the studies referred to regarding simulator driving. In the driving simulator evaluations have been made of the benefit of various types of support systems for the driver, further driving behaviour has been investigated (in general and in particular situations when secondary tasks are carried out, etc.), as well as how the simulator functions as an instrument for assessing driving ability.

The instructions ...

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Research area

People in the transport system

  • Published: 2007-08-31
  • VTI-code: R581

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Expectations and experiences of professional drivers of rumble strips in combination with overtaking sections

Year:
2007
VTI-code:
N3-2007

Authors: Anna Anund , Mats Petersson

In order to increase the traffic safety on narrow roads the Swedish Road Administration has decided to use milled rumble strips at centre line in combination with overtaking sections. One of the road sections were this will be used is parts of road 33 between Eksjö and Målilla. The road is 8 meters wide, with an annual flow of 2,600 to 3,700 vehicles per day.

This report is based on a qualitative study aiming to capture the professional drivers’ opinions and expectations about a road design using milled rumble strips at centre line in combination with solid line and overtaking ...

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Research area

People in the transport system
Traffic safety

  • Published: 2007-08-23
  • VTI-code: N3-2007

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Drinking and driving. In-depth interviews with convicted drivers

Year:
2007
VTI-code:
R553

Authors: Sonja Forward , Inger Linderholm , Inger Forsberg

Eleven persons who had been sentenced to rehabilitation for drunken driving participated in this interview study. Most of them had had a driving licence for quite a long time, several of them for more than twenty-five years. Five persons had applied for and had also had an alcolock device installed in their vehicles, whilst six persons had chosen to refrain for various reasons. In-depth interviews were carried out according to a fixed interview guide with opportunities for spontaneous comments. The interviews dealt with two different areas; the first concerned respondents’ attitudes towards ...

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Research area

People in the transport system

  • Published: 2007-06-21
  • VTI-code: R553

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How do drivers evaluate fines for different traffic offences? A literature study

Year:
2007
VTI-code:
R574

Authors: Sonja Forward , Hans-Åke Cedersund

The most common sanction for most traffic offences in Sweden is a fine, but it is only one of several sanction options for society. If one is caught driving without a safety belt, and other similar minor traffic offences, the sanction is always a fine of fixed sum. For minor speeding offences a fixed sum is also charged. It is only for excessive speeding that a court may adjudge the confiscation of the driving license for a shorter or longer period. For drunken driving fines are not used at all. Instead a monetary fine, i.e. a fine assessed on the basis of the defendant’s daily income, will ...

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Research area

People in the transport system

  • Published: 2007-04-18
  • VTI-code: R574

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A quality evaluation of a travel survey. A study of sampling errors, nonresponse errors and measurement errors

Year:
2007
VTI-code:
R575

Authors: Åsa Forsman , Anna Vadeby , Susanne Gustafsson

TSU92- is a travel survey that started in 1992, and the aim was to increase the knowledge of unprotected road-users; both with respect to how much and where they travel and their use of safety equipment such as helmets and reflectors. The survey is still focused on the unprotected road-users, but questions about car use and use of public transportation are also included. The response rate has been around 55 percent the last years. An evaluation of the quality of the survey is presented in this report and some suggestions on how to improve the survey is given. The study is limited to three ...

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Research area

People in the transport system

  • Published: 2007-03-27
  • VTI-code: R575

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VMS – Variable Message Signs. A literature review

Year:
2007
VTI-code:
R570A

Authors: Gabriel Helmers , Sara Nygårdhs

The acronym VMS stands for Variable Message Sign. It is a sign for the purpose of displaying one of a number of messages that may be changed or switched on or off as required (CEN, 2005).

This literature review is primarily aimed at describing studies that deal with the interaction between driver behaviour and VMS. The collected references are, for the most part, published in Europe or studies about European conditions, published during the years of 2000 2005.

Areas treated in the study are effects on driver behaviour, driver attitudes, design, understanding and recall ...

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Research area

People in the transport system
Traffic safety

  • Published: 2007-03-06
  • VTI-code: R570A

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Passing a bus with 30 km/h. Assessment of safety effects of a speed limit of 30 km/h when passing a bus – a simulator study

Year:
2007
VTI-code:
R573

Authors: Birgitta Thorslund , Albert Kircher , Torbjörn Falkmer , Katja Kircher , Anna Anund

A simulator study was conducted to investigate the implementation of a new law which
prescribes a speed limit of 30 km/h when passing buses equipped with a 30-sign and
flashing lights. It was shown that the drivers follow the rule better when they pass a bus
on their own side than when the bus was standing on the opposite side of the road. The
slowest mean speeds were found when passing a bus on a road with a speed limit of
70 km/h. The highest speed reduction, however, was found when the posted speed limit
was 90 km/h. A bus without signage did not induce the ...

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Research area

People in the transport system
Traffic safety

  • Published: 2007-03-06
  • VTI-code: R573

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Bus drivers' working environment

Year:
2006
VTI-code:
R557

Authors: Selina Mårdh

At the assignment of the Swedish Road Administration, VTI has performed a study on “The working environment of bus drivers”.
The aim of the study was to describe the working environment of bus drivers according to contemporary research. The result of the study is supposed to act as basis for future development of the working environment of bus drivers.
The study comprises the following three parts:
• Part one – An introductory interview study with bus driver employers.
• Part two – A literature review on recent research on bus drivers’ working environment.
• Part ...

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Research area

People in the transport system
Vehicle technology

  • Published: 2006-11-08
  • VTI-code: R557

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