| 31. |
- Adell, Emeli, et al.
(författare)
-
Cyclists' use of mobile IT in Sweden : usage and self-reported behavioural compensation
- 2014
-
Ingår i: 3rd International Cycling Safety Conference (ICSC2014), 18-19 November, Gothenburg, Sweden. - Gothenburg, Sweden.
-
Konferensbidrag (refereegranskat)abstract
- The increasing use of mobile phones while cycling has raised safety concerns. In this paper two studies of mobile phone use by cyclists are presented.The first study was designed to characterize mobile phone use by cyclists in Sweden, while the second studied how mobile phone use affected cyclist behaviour and compensation strategies. Mobile phone use was observed in about 20 percent of all urban bicycle trips. The usage varied with cyclist age with the highest usage among young cyclists. Of those using phones, 90% of the cyclists observed used head-phones.In parallel, standardized, interviews 15% of cyclists under 15 years old stated that they always used mobile phones while cycling. Listening to music in headphones was the most fre-quent self-reported activity. To converse using hand-held phones was also rather common, and was the only mobile phone usage reported by women above 50 years old.In the second study twenty-two young cyclists (age 16-25 years) completed a route in real traffic five times while listening to music, receiving and making calls, receiving and sending text messages, searching for information on the internet and while cycling normally without using the phone. The route and the types of tasks were controlled, but the cyclists could choose rather freely when, where and how to carry out the tasks. When the cyclist returned to the starting point, a short interview was conducted. During the interviews cyclists reported their experiences and the compensation strategies they used while cycling.
|
|
| 32. |
- Adell, Emeli, et al.
(författare)
-
Exponering av oskyddade trafikanter med hjälp av app-baserade resvaneundersökningar
- 2024
-
Ingår i: Sammanställning av referat från Transportforum 2024. - Linköping : Statens väg- och transportforskningsinstitut. ; , s. 287-288
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Trafiksäkerhetsarbetet har kommit långt i Sverige, men det finns stora utmaningar kvar vad gäller oskyddade trafikanters trafiksäkerhetssituation. Trafiksäkerhetsrisken baseras på antalet olyckor eller personskador per trafikant, trafikarbete eller annat exponeringsmått. För oskyddade trafikanter är dock förståelsen av exponering begränsad och det finns generellt ett behov av bättre förståelse för oskyddade trafikanters exponering i termer av reslängder, tid i olika trafikmiljöer.Samtidigt som kunskapsläget kring skyddade trafikanters exponering i allmänhet är låg ger ökad digitalisering nya sätt att förstå människors resvanor och användning av trafiksystemet. I app-baserade resvaneundersökningar används positioneringsdata från mobiltelefonen, vilket kan ge värdefull information om exponering men också annan trafiksäkerhetsrelevant information, så som hastigheter.Denna studie har undersökt om data från app-baserade resvaneundersökningar kan använts för att ge värdefull information om a) den oskyddade trafikantgruppen, b) exponering och c) annan trafiksäkerhetsrelevant information. Underlaget har varit en kommunal app-baserad resvaneundersökning. Fokus har varit cyklister. Positioneringsdata har knutits till infrastrukturen via map-matching mot en geografisk databas. Genom detta kan typ av infrastruktur (till exempel gång- och cykelvägnät) och infrastrukturens olika egenskaper (till exempel hastighetsgränser) knytas till varje enskild del av en resa. Hastigheter har beräknats hjälp av GPS-positionering och tidsangivelser utmed hela resans sträckning. Vi har i denna studie valt att beräkna hastigheter på 50-meterssektioner, vilket bedöms ge en bra bild över hastighetsprofilen över resan.Det är med hjälp av data från app-baserad resvaneundersökning möjligt att beskriva hur mycket olika typer av individer cyklar, både i antal resor, reslängd och restid, både totalt och fördelat över dygnet. Den geografiska informationen gör det dessutom möjligt att förstå i vilken trafikmiljö som resor sker. I denna studie har vi analyserat hur mycket av transportarbetet som skett på olika typer av infrastruktur, vilket kan ställas i relation till var olyckor och skador skett för att beräkna trafiksäkerhetsrisker på olika typer av infrastruktur. I detta fall har vägtyp och hastighetsgräns använts, men det skulle också kunna vara typ av korsning om den data finns tillgänglig i den digitala beskrivningen av infrastrukturen.
|
|
| 33. |
- Adell, Emeli, et al.
(författare)
-
How Is Acceptance Measured? : Overview of Measurement Issues, Methods and Tools
- 2014
-
Ingår i: Driver Acceptance of New Technology. - Farnham, Surrey, England : Ashgate. - 9781409439844 ; , s. 74-88
-
Bokkapitel (refereegranskat)abstract
- This chapter describes how acceptance has been measured and identifies various measurement categories. The relationship between these measurement methods and the different definitions of acceptance appearing in the literature is described and the lack of correspondence between definition and measurement is highlighted. The chapter illustrates the different outcomes of acceptance measurements depending on choice of assessment method and gives some guidance that could be used depending on the purpose of the assessment.
|
|
| 34. |
- Adell, Emeli, et al.
(författare)
-
Investigating untapped bike potential with crowdsourcing data
- 2024
-
Ingår i: Sammanställning av referat från Transportforum 2024. - Linköping : Statens väg- och transportforskningsinstitut. ; , s. 488-489
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The city of Lund has a high share of trips done by bicycle, and ambitious goals of becoming climate-neutral by 2030. Still the municipality, like many other cities, has difficulty in reaching the goals of increasing cycling and needs to find the real potential. To understand the untapped cycling potentials of a city, and generally to promote it, it is important to first assess how bike is used and why. This can be done by observing the bike flows and understanding the reasons for the use or misuse of bikes as a transport mode. Particularly, for the scope of identifying untapped potential, the preferred time scale should be smaller than the traditional count based on annual average figures. Also, opposite to motorized traffic, bicycle volume can rapidly change inside a city. All this caused the need to search for more effective methods to estimate bicycle volume like crowdsourcing data that can be provided by mobile apps which are usually collected for other purposes. The present study introduces a method of bicycle volume estimation based on GPS data from the TravelVu application, an app-based tool to collect travel survey data. A spatial analysis has been chosen to investigate the correlation between the data from the Lund municipality counting and the GPS data from TravelVu app. The analysis has been performed by comparing the average daily bike volume with the aggregated data in 3 months for the GPS track. Counting data refers to 2018 and 2021 and the TravelVu data refers to 3 months starting from August 2018 and 2021, where 2018 data are collected through crowdsourcing and 2021 are random sampling. All the weekend data have been removed since the manual counting was always carried out during weekdays (and should be represented by those). At first, all the data from the Lund municipality report were digitalized in a GIS map and then clustered per intersection to have a more robust regression when compared to the TravelVu data and to reduce the possible spatial errors.
|
|
| 35. |
- Adell, Emeli, et al.
(författare)
-
Modelling Acceptance of Driver Assistance Systems : Application of the Unified Theory of Acceptance and Use of Technology
- 2014
-
Ingår i: Driver Acceptance of new technology. - Farnham, Surrey, England : Ashgate. - 9781409439844 ; , s. 23-34
-
Bokkapitel (refereegranskat)abstract
- This chapter provides a brief overview of acceptance models used within the area of information technology. One particular model, the Unified Theory of Acceptance and Use of Technology (UTAUT), is then discussed, and a study is reported in which the model was used to assess driver acceptance of a particular driver assistance system. The key findings of that study are reported, and suggestions are made for refining UTAUT to make it more suitable for assessing acceptance of driver assistance systems.
|
|
| 36. |
- Adell, Emeli, et al.
(författare)
-
The Definition of Acceptance and Acceptability
- 2014
-
Ingår i: Driver Acceptance of New Technology. - Farnham, Surrey, England : Ashgate. - 9781409439844 ; , s. 11-21
-
Bokkapitel (refereegranskat)abstract
- Despite the recognised importance of the concept of acceptance, how and why new technologies are actually accepted by drivers is not well understood. While many studies claim to have measured acceptance, few have explicitly defined what it is. This chapter points out the importance of defining acceptance and categorises definitions that have been used according to their “essence”. Distinctions between different types of acceptance as well as between acceptance and acceptability are also described. A proposal for a common definition of acceptance is then presented and discussed.
|
|
| 37. |
- Adesiyun, Adewole, et al.
(författare)
-
Overview of connected and automated driving test sites
- 2020
-
Ingår i: Proceedings of 8th Transport Research Arena TRA 2020. ; , s. 7-
-
Konferensbidrag (refereegranskat)abstract
- Connected and automated vehicles potentially offer solutions to some key challenges for National Road Administrations (NRAs), such as reduction of accidents, increasing network capacity etc. As a result of this potential, both industry and certain national governments are undertaking trials that are mainly focused on technological challenges such as the ability of vehicles to drive safely in “random” situations etc. Far less attention has been paid to questions around the implications for NRAs. The overall aim of the STAPLE project is to provide a comprehensive review of technological and non-technological aspects of the most relevant connected and automated driving test sites in order to understand the impact of these sites on the NRAs’ core business and functions.
|
|
| 38. |
|
|
| 39. |
|
|
| 40. |
- Adolehoume, Amakoe, et al.
(författare)
-
Road safety policies in seven West African countries
- 2001
-
Ingår i: Proceedings of the Conference Road Safety on Three Continents in Pretoria, South Africa, 20-22 September 2000. - Linköping : Statens väg- och transportforskningsinstitut. ; , s. 303-316
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- At the end of 1999, UEMOA, the Economic and Monetary Union for West Africa, launched a study of the road safety situation and management processes in seven of the eight countries of the Union (Benin, Burkina Faso, Cite d'Ivoire, Mali, Niger, Senegal, Togo), in view of formulating Communal Road Safety Policies at the regional level. A team of African and European "experts" was formed to establish a diagnosis on each country as well as a global assessment of the situation in the region, and to draw proposals for action. The final report was published in March 2000 and is now being evaluated by UEMOA and integrated into a wider proposal for transport policies, for presentation at a round table of donors. The present paper does not provide a complete summary of the outcome of the study, but presents a selection of some difficult problems encountered in the countries investigated and directions for possible solutions as seen by the researchers and consultants that took part in the study. Comprehensive proposals and guidelines for Communal Road Safety Policies are not included as they have not officially been accepted by UEMOA yet, but the original report can be requested from this organisation in Ouagadougou. A brief outline of the approach and methodology used is described. More complete methodological guidelines, developed from the experience gathered through the UEMOA study as well as previous ones carried out by Inrets (the French National Institute for Transport and Safety Research) will be published at a later stage.
|
|
