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Nya kövarningsskyltar längs E6 genom Göteborg: resultat av utvärderingsintervjuer
Swedish National Road and Transport Research Institute.
2002 (Swedish)Report (Other (popular science, discussion, etc.))
Abstract [sv]

A before-after study was carried out to provide some data on the

effectiveness of new, computer

controlled LED-equipped traffic signs, warning for congested traffic. Data

were collected through

telephone interviews with drivers who had been observed driving in the

specially signed road

section the morning of the same day when the interview was made. 203

interviews were made in

the "before" period, and 224 in the "after" period, i.e. after the new sign

system had been installed.

Various methodological problems indicate the need for a certain caution in

interpretation, but

the overall results indicate that most of the drivers in the "after" period

had seen the new signs and

that most of them also interpreted the signs correctly. In spite of this

finding the reported

behavioural effects are practically non-existent.

The interview included opportunities for spontaneous comments and several

drivers pointed out

that the message from, or function of, the new signs did not seem very

reliable to them.

Some data, giving a more general overview of the morning traffic towards

Gothenburg, are also


Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut., VTI notat 1-2002 , 2002.
VTI notat
Keyword [en]
Swedish, Sweden, Congestion, Queue, Warning, Variable message sign, Change, Before and after study, Interview, Driver, Attitude, Visibility, Comprehension
Research subject
Road: Traffic engineering, Road: Traffic control and traffic information; Road: Traffic engineering, Road: Traffic measurement and traffic analysis
URN: urn:nbn:se:vti:diva-1394OAI: diva2:670104
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2013-12-03

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Dahlstedt, Sven
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