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Läsbarhet av vägskyltar i form av LED-skylt: färgkombination och fontstorlekens betydelse för läsbarheten
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.
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.
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2015 (Swedish)Report (Other academic)Alternative title
LED roads signs readability : effects of color combinations, font size and light conditions on readability (English)
Abstract [sv]

Läsbarheten av vägskyltar har studerats och då i LED-format. Avsikten med studien var att studera effekten av färgkombination, fontstorlek och ljusbetingelser för läsbarheten av en LED-skylt. 101 studenter deltog i studien, där 32 var män och 69 var kvinnor. Deras ålder varierade mellan 18–66 år. Valet av försökspersoner påverkades av studiens syfte, det vill säga det var inte intressant att studera vare sig skillnader mellan olika kön, ålder eller synförmåga. En statistisk analys genomfördes för att studera hur läsbarhetsavstånden varierade som en effekt av färgkombination, fontstorlek och ljusförhållanden. Vidare uppmättes belysningsstyrkan vid de datainsamlingstillfällen som genomfördes. Läsbarhetsavstånden undersöktes både i dagsljus och i mörker. Resultaten av studien visar att färgkombinationen på skylten påverkar dess läsbarhet. Skyltar med vit text på blå, brun eller grön bakgrund kunde avläsas vid längre avstånd än skyltar med svart text på vit eller orange bakgrund. Fontstorleken är också av betydelse för läsbarheten och varje ökning i fontstorlek ger en signifikant skillnad i avstånd som skylten kan avläsas på där skylten med den största fontstorleken (300 mm) avläses från längst avstånd. Skyltarna avläses även vid längre avstånd i dagsljus jämfört med mörker. Läsbarheten av skylten med den minsta fontstorleken 200 millimeter ändras dock inte signifikant vid dagsljus jämfört med mörker. Dessa entydiga resultat påvisar att samtliga variabler som studerats har betydelse för läsbarheten. Det ska dock tilläggas att försöksdeltagarna stod stilla vid de tillfällen som de avläste skyltarna och hade fri sikt till skylten.

Abstract [en]

The readability of road signs was studied and in particular the LED format. The purpose of this study was to study the effect of color combination, font size and light conditions on readability. 101 students participated in the study, where 32 were men and 69 were women. Their age ranged from 18–66 years. The choice of subjects were driven by the study's purpose, i.e. for this study it was not of interest to study the differences between gender, age or eyesight. A statistical analysis was carried out to study how readability distances varied as a result of the combination of colors, font size and light conditions. Furthermore, illuminance was measured when the data collection occasions was conducted. Distances were examined both in daylight and in darkness. The results of the study show that the color combination of the LED-sign affects its readability. Signs with white text on blue, brown or green background could be read correctly at a greater distance than the signs with black text on white or orange background. The font size is also important for the readability and every increase in font size produces a significant difference in the distance that the sign can be read. The sign with the largest font size (300 mm) was read correctly from the longest distance. The signs were read even at greater distances in daylight than in darkness. The readability of the sign with the smallest font size 200 mm does not change significantly during the daylight compared to darkness conditions. These conclusive results demonstrate that all the variables studied are important for readability. It should be added that participants stood still during the trial when they scanned/read the signs and had free sight to the LED-sign.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut, 2015. , 28 p.
Series
VTI notat, 15-2015
Keyword [en]
Traffic sign, Light emitting diode, Legibility, Visibility, Colour, Lettering, Luminance, Experiment
National Category
Applied Psychology
Research subject
20 Road: Traffic engineering, 22 Road: Traffic control and traffic information
Identifiers
URN: urn:nbn:se:vti:diva-7931OAI: oai:DiVA.org:vti-7931DiVA: diva2:822859
Available from: 2015-06-17 Created: 2015-06-17 Last updated: 2015-09-21Bibliographically approved

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Andersson, JanEriksson, GabriellaAbadir Guirgis, GeorgBagdadi, OmarIhlström, JonasThorslund, Birgitta
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Human-vehicle-transport system interactionSwedish National Road and Transport Research Institute
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