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Frästa räfflor i mitten på tvåfältsväg
Swedish National Road and Transport Research Institute.ORCID iD: 0000-0002-4790-7094
2005 (Swedish)Report (Other academic)Alternative title
Milled rumble strips on the centre line on a two-lane road (English)
Abstract [sv]

Milled rumble strips in combination with the centre line could be a way to

improve traffic safety and to explore the concept of selfexplanatory roads as

a counter measure. The aim of the study was to evaluate whether a centre line

in combination with a milled rumble strip helps to improve driver behaviour

with the possible result of fewer accidents, especially head-on accidents.

The evaluation mainly dealt with the rumble strip as a self explanatory

counter measure and only indirectly considered forgiving road aspects e.g.

warning by the rumble strip in the event of a lane deviation caused by driver

fatigue or distraction. A before-after study was initiated in August 2003.

Three different methods were used; measures of speed and lateral position for

traffic flow in four positions on the road, observations of overtaking

behaviour and finally road side interviews. The result showed that milled

rumble strips in combination with the centre line definitely have en effect

on car drivers. They reduced their speed by 1.8 kilometres per hour and they

drove 5 centimetres closer to the edge line. Both changes in speed and

lateral position were significant at the 5% level. There were no significant

effects on truck drivers' choice of speed or position. Furthermore there was

no significant difference in overtaking behaviour. The rumble strips were

favourably received by drivers; 76% answered that milled rumble strips at

centre line would make them feel more secure about that no driver will

inadvertently drive into their lane; 83% answered that milled rumble strips

will make them feel secure about that they are not about to leave the lane

without being aware of this; 88% of the respondents thought milled rumble

strips at the centre line will increase traffic safety.

Place, publisher, year, edition, pages
Linköping: VTI. VTI rapport 508 , 2005.
VTI rapport, ISSN 0347-6030
Keyword [en]
Swedish, Sweden, Rumble strip, Median, Carriageway marking, Accident prevention, Before and after study, Speed, Lateral, Location, Traffic lane
Research subject
Road: Traffic safety and accidents, Road: Geometric design and traffic safety; Road: Highway design, Road: Surfacing
URN: urn:nbn:se:vti:diva-6375OAI: diva2:675252
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2016-02-22

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Anund, Anna
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