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Ljudvarningar vid vägarbetsplatser för att uppnå sänkta hastigheter: Kartläggning och praktisk utvärdering
Swedish National Road and Transport Research Institute, Traffic and road users, Traffic safety, society and road-user.ORCID iD: 0000-0002-5198-8851
Swedish National Road and Transport Research Institute, Traffic and road users, Traffic safety, society and road-user.
Swedish National Road and Transport Research Institute, Infrastructure, Infrastructure maintenance.ORCID iD: 0000-0002-5306-2753
Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
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2014 (Swedish)Report (Other academic)Alternative title
Speed reducing audio warnings at road works : Literature review and simulator experiment (English)
Abstract [sv]

Ett projekt har genomförts i syfte att hitta metoder som effektivt sänker förbipasserande trafikanters hastigheter vid vägarbetsområden genom att i realtid varna med hjälp av ljud. Projektet har bestått av två delar. Först genomfördes en kartläggning av befintliga studier. Resultaten visar att de egenskaper i en ljudvarning som ger större effekt är att den har kvinnoröst, är direkt och informativ, samverkar mellan semantik och akustik, ökar i intensitet och medför nedtoning av andra ljuddistraktioner. Med bas i resultaten från kartläggningen gjordes en praktisk utvärdering av potentiell användning av ljudvarningar vid vägarbetsplatser i VTI:s simulator Sim III. Tjugotvå personbilsförare körde 25 kilometer på en motorväg där två vägarbeten fanns utplacerade i vägrenen. Hälften av försökspersonerna fick en ljudvarning före det första vägarbetet och den andra hälften före det andra vägarbetet. Ljudvarningen bestod av ett "pling" följt av en kvinnoröst som sa ”Varning! Vägarbete om 500 meter. Anpassa hastigheten!”. Meddelandet sändes via bilens interna högtalarsystem. Resultaten visar bland annat en signifikant hastighetsreducerande effekt av ljudvarningen. Den genomsnittliga sänkningen skattas till 9–17 km/h större med ljudvarning än utan. Vidare fanns en liten effekt (0,5–3,3 km/h) kvar av ljudvarningen även efter vägarbetet. Fler resultat presenteras tillsammans med förarnas subjektiva upplevelser av försöket.

Abstract [en]

A project has been carried out to find methods that effectively decrease drivers’ speeds at road work sites through real-time audio warnings. The project consisted of two parts. First, a survey of existing studies took place. The results show that the characteristics of a successful audio alert are female voice, direct and informative messages, an interaction between semantics and acoustics, successively increased intensity, and the dimming of secondary audio distractions. Based on the results of the survey, a practical evaluation of the potential use of audio warnings at road work sites was carried out in a VTI driver simulator. Twenty-two car drivers drove 25 kilometer on a motorway where two road works were placed on the hard shoulder. Half of the subjects were given an audio warning before the first road work and the other half prior to the second roadwork. The audio warning consisted of a sound similar to that of a GPS warning signal, followed by a female voice saying "Warning! Road work within 500 meters. Adjust the speed!". The message was sent via the car's internal speaker system. The speed reducing effect is significant and the average decrease is estimated to be 9–17 km/h greater with audio warning than without. Furthermore, there was still a small effect (0.5–3.3 km h) left of the audio alert after the road works. More results of the simulation tests are presented along with the drivers’ subjective opinions of such systems.

Place, publisher, year, edition, pages
Linköping: VTI , 2014. , 38 p.
Series
VTI rapport, ISSN 0347-6030 ; 805
Keyword [en]
Work zone, Speed, Traffic calming, Aural signal, Warning, Real time, Driver, Behaviour, Simulator (driving), Test
National Category
Applied Psychology
Research subject
Road: Traffic safety and accidents, Road: Road user behaviour; Road: Traffic engineering, Road: Traffic control and traffic information
Identifiers
URN: urn:nbn:se:vti:diva-6840OAI: oai:DiVA.org:vti-6840DiVA: diva2:709153
Available from: 2014-03-31 Created: 2014-03-31 Last updated: 2016-02-25Bibliographically approved

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Gustafsson, SusanneSörensen, GunillaEriksson, OlleGenell, AndersJägerbrand, Annika
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