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Speed distribution and traffic safety measures
Swedish National Road and Transport Research Institute, Traffic and road users, Traffic safety, society and road-user.ORCID iD: 0000-0002-9164-9221
Swedish National Road and Transport Research Institute, Traffic and road users, Traffic safety, society and road-user.ORCID iD: 0000-0003-4680-4795
2014 (English)Conference paper, Published paper (Refereed)
Abstract [en]

A main  traffic  safety  priority in  many  countries  is  implementing measures  that reduce  road  user  speed  and increase  speed limit compliance. This study compares changes in the  speed distribution  and estimated accident risk brought about by three measures:

  1. speed limit change from 110 to 100 km/h on roads without speed cameras
  2. speed  limit  change  from  90  to  80  km/h  on  roads  with  speed  cameras
  3. introducing new  speed  cameras  on roads  with a  speed  limit  of 90  km/h

The  accident  risk  is  estimated  from  mean  speed  since  the  impacts of  a change in mean speed on the number of accidents and of injured and killed people are well known. The results indicate that installing speed  cameras  can  reduce  average  speed  more  than can reducing the  speed  limit  by  10 km/h, at least at the camera locations. Moreover, speed cameras reduce the standard deviation of speed and the percentage of drivers exceeding the speed limit by far more than does lowering the mean speed. This implies that the  relationship  between  change  in  speed  distribution,  not  only  mean  speed,  and  traffic  safety merits further investigation.

Place, publisher, year, edition, pages
2014.
Keyword [en]
Speed, Average speed, Accident prevention, Impact study, Speed limit, Camera, Enforcement (law)
National Category
Transport Systems and Logistics
Research subject
80 Road: Traffic safety and accidents
Identifiers
URN: urn:nbn:se:vti:diva-7118OAI: oai:DiVA.org:vti-7118DiVA: diva2:747569
Conference
Transport Research Arena (TRA)
Available from: 2014-09-17 Created: 2014-09-17 Last updated: 2016-02-25Bibliographically approved

Open Access in DiVA

fulltext(467 kB)63 downloads
File information
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Type fulltextMimetype application/pdf

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Vadeby, AnnaForsman, Åsa
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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • 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