Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Traffic safety effects of new speed limits in Sweden
Swedish National Road and Transport Research Institute, Traffic and road users, Trafiksäkerhet och trafiksystem, TST.ORCID iD: 0000-0002-9164-9221
Swedish National Road and Transport Research Institute, Traffic and road users, Trafiksäkerhet och trafiksystem, TST.ORCID iD: 0000-0003-4680-4795
2017 (English)In: Accident Analysis and Prevention, ISSN 0001-4575, E-ISSN 1879-2057Article in journal (Refereed) In press
Abstract [en]

Driving speeds affect the risk of being involved in a crash and the injury severity as well as the noise and exhaust emissions. Starting 2008, the Swedish Transport Administration performed a review of the speed limits on the national rural road network. This review resulted in major changes of the speed limits on the rural road network. It was predominantly roads with a low traffic safety standard and unsatisfactory road sides that were selected for reduced speed limits, as well as roads with a good traffic safety record being selected for an increase in speed limits.

The aim of this study is predominantly to describe and analyse the longterm traffic safety effect of increased, as well as, reduced speed limits, but also to analyse the changes in actual driving speeds due to the changed speed limits. Traffic safety effects are investigated by means of a before and after study with control group and the effects on actual mean speeds are measured by a sampling survey in which speed was measured at randomly selected sites before and after the speed limit changes.

Results show a reduction in fatalities on rural roads with reduced speed limit from 90 to 80. km/h where the number of fatalities decreased by 14 per year, while no significant changes were seen for the seriously injured. On motorways with an increased speed limit to 120. km/h, the number of seriously injured increased by about 15 per year, but no significant changes were seen for the number of deaths. The number of seriously injured increased on all types of motorways, but the worst development was seen for narrow motorways (21.5. m wide). For 2 + 1 roads (a continuous three-lane cross-section with alternating passing lanes and the two directions of travel separated by a median barrier) with decreased speed limit from 110 to 100. km/h, the seriously injured decreased by about 16 per year. As regards the change of mean speeds, a decrease in speed limit with 10. km/h led to a decrease of mean speeds of around 2-3. km/h and an increase of the speed limit with 10. km/h resulted in an increase of mean speed by 3. km/h.

Place, publisher, year, edition, pages
2017.
Keyword [en]
Speed limit, Increase, Decrease, Evaluation (assessment), Traffic safety, Before and after study, Average speed, Measurement, Accident rate, Fatality, Injury
National Category
Infrastructure Engineering
Research subject
80 Road: Traffic safety and accidents, 813 Road: Accident risk
Identifiers
URN: urn:nbn:se:vti:diva-11651DOI: 10.1016/j.aap.2017.02.003Scopus ID: 2-s2.0-85013157733OAI: oai:DiVA.org:vti-11651DiVA: diva2:1082008
Available from: 2017-03-15 Created: 2017-03-15 Last updated: 2017-03-23Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Vadeby, AnnaForsman, Åsa
By organisation
Trafiksäkerhet och trafiksystem, TST
In the same journal
Accident Analysis and Prevention
Infrastructure Engineering

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 10 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf