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Samband mellan hastighet och belysning
Swedish National Road and Transport Research Institute, Traffic and road users, Human-vehicle-transport system interaction.
Swedish National Road and Transport Research Institute, Traffic and road users, Human-vehicle-transport system interaction.
2014 (Swedish)Report (Other academic)Alternative title
The relationship between speed and illumination (English)
Abstract [sv]

Sambandet mellan spontant vald hastighet och belysningsnivå har studerats på reell trafik. Hastigheten för personbilar som inte var störda av annan trafik mättes på tio provsträckor i och nära Linköping. Provsträckorna hade valts så att de representerade en stor variation i belysningsstyrka. Mätningarna gjordes både i dagsljus och mörker, där dagsljusmätningarna fick utgöra referensen. Beroendevariabel i studien var skillnaden i spontant vald hastighet mellan dagsljus och mörker. En hypotes var att denna skillnad – hastighet i dagsljus minus hastighet i mörker – skulle ha ett högt värde (med korrekt tecken) på gator med hög belysningsnivå och ett lågt värde på gator med lägre belysning. En central frågeställning var om en låg belysningsnivå innebar så mycket lägre hastigheter att den kompenserade för sämre synbarhet av objekt i vägmiljön. Detta skulle i så fall innebära att synbarhetsavståndet uttryckt i tid skulle vara längre. Om så är fallet skulle den reducerade belysningen spara energi och miljö utan att ge avkall på trafiksäkerheten.

Abstract [en]

The relationship between spontaneous choice of speed and lighting level on streets with stationary light has been studied. On ten streets in Linköping, the speed of cars which were not disturbed by other traffic, was measured. These measurements were carried out both during daylight and darkness conditions, where the daylight condition measurements were used as reference. The dependent variable was the difference between speed in daylight and darkness. The hypothesis was that this difference would be high (including sign) on streets with high illuminance level and low on streets with lower lighting level. One important question was if low lighting levels would result in lower speeds that would compensate for the worse visibility of objects in or close to the street. If so, there would be a positive effect on energy and environment without making impairing traffic safety.

Place, publisher, year, edition, pages
Linköping: VTI , 2014. , 29 p.
Series
VTI notat, 3-2014
Keyword [en]
Speed, Driver choice, Behaviour, Lighting, Luminance, Visibility distance, Daylight, Darkness, Measurement, Test
National Category
Transport Systems and Logistics
Research subject
Road: Traffic safety and accidents, Road: Road user behaviour; Road: Highway design, Road: Safety devices
Identifiers
URN: urn:nbn:se:vti:diva-6773OAI: oai:DiVA.org:vti-6773DiVA: diva2:695909
Available from: 2014-02-12 Created: 2014-02-12 Last updated: 2014-05-13Bibliographically approved

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Lundkvist, Sven-OlofIhlström, Jonas
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CiteExportLink to record
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