| 1. |
- Aldenius, Malin, et al.
(author)
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The role of environmental requirements in Swedish public procurement of bus transports
- 2022
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In: International Journal of Sustainable Transportation. - : Informa UK Limited. - 1556-8318 .- 1556-8334. ; 16:5, s. 391-405
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Journal article (peer-reviewed)abstract
- The transport sector needs to become sustainable and public transport has an important role to play. Green public procurement has proven to have great potential to influence the transition to a sustainable public transport sector. Sweden is a good example of a country that uses public procurement in the public transport sector to a large extent and has at the same time come far in the transition to renewable fuel. The aim of this study is to examine what role public transport authorities (PTAs) can have in supporting more environmentally sustainable public transport through public procurement. This was done by a content analysis regarding the expressions of environmental requirements historically, over a ten-year period, in tender documents in Sweden, followed by a workshop where the implications of the findings and future tender processes were discussed with relevant actors. The results showed that all the environmental requirements have become stricter during the studied period, but indicate a tendency for higher use of environmental requirements in tendering of larger areas as well as in tendering of public transport within cities. Specifically, for requirements for fuel, the same tenders also use specific requirements to a higher extent. However, the subsequent workshop discussions indicated that the use of specific requirements is one reason for disagreement among involved actors. Overall, this study of the Swedish public transport case showed that PTAs have a large potential to support more environmentally sustainable solutions using environmental requirements in public procurement.
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| 2. |
- Arvidsson, Niklas, 1979, et al.
(author)
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An ex ante evaluation of mobile depots in cities : A sustainability perspective
- 2017
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In: International Journal of Sustainable Transportation. - : Informa UK Limited. - 1556-8318 .- 1556-8334. ; 11:8, s. 623-632
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Journal article (peer-reviewed)abstract
- Today, a large share of cost, congestion, and emission in cities is attributed to light goods vehicles like carrier vans distributing to the last mile. The aim of many policy agendas is to reach cleaner cities with less disturbance from the distribution vehicles. Several suggestions have been put forward and tested in research and practice, such as access restrictions, multimodal transport, and use of cleaner vehicles. In this paper, we develop a case for a more sustainable freight distribution within cities using an ex ante case study. The idea of the mobile depot is built on the iteration between historical transitions within cities and contemporary developments in urban freight distribution, and then analyzed ex ante both quantitatively in calculations and qualitatively in two stakeholder workshops. The idea is integrated and multimodal, based on a mobile depot (e.g., a bus, truck, barge, or tram) that circles the city and connects to low emission last mile delivery options such as LEVs (Light Electrical Vehicles) or cargo bikes. We found that such a system can be environmentally and socially better for the city context, while maintaining economic viability above a certain utilization rate of the mobile depot for the transport operators.
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| 3. |
- Bjørnarå, Helga Birgit, et al.
(author)
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The impact of weather conditions on everyday cycling with different bike types in parents of young children participating in the CARTOBIKE randomized controlled trial
- 2023
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In: International Journal of Sustainable Transportation. - : Taylor & Francis Group. - 1556-8318 .- 1556-8334. ; 17:2, s. 128-135
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Journal article (peer-reviewed)abstract
- Knowledge about how weather conditions affect travel behavior in different user groups and contexts is relevant for planners and policymakers to facilitate sustainable transportation systems. We aimed to assess the influence of day-to-day weather on cycling for transportation among parents of young children with access to different bike types (e-bike vs non e-bike) in a natural study setting over nine months. We hypothesized less impact of weather variability on cycling when using an e-bike compared with a non e-bike. A randomized, controlled trial was conducted in Southern Norway. The intervention group (n = 18) was in random order equipped with an e-bike with trailer for child transportation (n = 6), a cargo (longtail) bike (n = 6) and a traditional bike with trailer (n = 6), each for three months. These 18 participants reported cycling on 832 out of 3276 person-days (25%). We used dynamic structural equation modeling for intensive longitudinal data to examine the relations between daily weather conditions, bike type (e-bike vs traditional bike), and cycling (dichotomized daily at yes or no). Air temperature (positively) and wind speed (negatively) were both credible predictors of cycling, whereas the other predictors (precipitation in the morning (yes or no) and presence of snow (yes or no) were not. We added interaction terms between bike type and weather conditions, but none of the interaction terms had a credible effect on cycling. Thus, the relations between weather conditions and cycling were not moderated by bike type among parents of young children.
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| 4. |
- Borén, Sven, 1971-
(author)
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Electric buses' sustainability effects, noise, energy use, and costs
- 2020
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In: International Journal of Sustainable Transportation. - : Taylor & Francis. - 1556-8318 .- 1556-8334. ; 14:12, s. 956-971
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Journal article (peer-reviewed)abstract
- Electric buses are growing in numbers in Sweden, which contributes to the development of a fossil fuel free society and a reduction of emissions. Earlier studies of bus systems have identified a need to further investigate societal costs, total cost of ownership, energy use on a yearly basis to account for seasonal variations, and noise during acceleration. Addressing those needs was the purpose of this study. Investigations were made in five cities in Sweden that have recently implemented different electric buses in their respective public transport system. Based on results from these investigations and earlier studies, updated and new calculations were made for electric buses on route 1 in Karlskrona, as a representative example. It was found that there were significant savings in societal costs and total cost of ownership when compared to diesel and biogas powered buses, mainly due to decreased noise, no emissions in the use phase, and decreased energy use.
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| 5. |
- Browne, Michael, et al.
(author)
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Transportation as a loosely coupled system: a fundamental challenge for sustainable freight transportation
- 2022
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In: International Journal of Sustainable Transportation. - : Informa UK Limited. - 1556-8318 .- 1556-8334. ; 17:7, s. 804-814
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Journal article (peer-reviewed)abstract
- In view of the pressing need to reduce the negative environmental impact of freight transportation we argue that it is essential to take account of the organization of the freight transportation system when considering how to address various individual activities and parts of the system. To support a transition to a more sustainable freight transportation system this paper examines the way in which different parts of the system interact and the way this can impact the scope for profound change. Taking loosely coupled systems (Weick, 1976) as a starting point, we scrutinize the couplings within and between three system layers of the freight transportation system: the supply chain layer, the transportation layer, and the infrastructure layer. In addition, we address two interfaces connecting these layers: the market for transportation services, and the traffic using the infrastructure. We find that tight couplings dominate in the supply chain and infrastructure layers and that these couplings depend on loose couplings in the transportation layer and the two interfaces. The pattern of couplings identified in the freight transportation system can explain several positive outcomes, such as flexibility and efficiency. But there are also major negative aspects of the loosely coupled nature of the system that create resistance to change and present a barrier in the drive for increased sustainability. The paper concludes that the identified couplings and system features have important implications for policies aiming to change the freight transportation system in ways that lead to significant reduction in the reliance on oil.
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| 6. |
- Cullinane, Kevin, et al.
(author)
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Estimation of Container Ship Emissions at Berth in Taiwan
- 2016
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In: International Journal of Sustainable Transportation. - : Informa UK Limited. - 1556-8318 .- 1556-8334. ; 10:5, s. 466-474
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Journal article (peer-reviewed)abstract
- This study uses a bottom-up activity-based model to estimate atmospheric emissions released from containerships at berth during the year 2012 in the three largest Taiwanese container ports: Kaohsiung, Keelung, and Taichung. The results produced indicate that containerships are responsible for a significant amount of airborne emissions in ports. Kaohsiung is found to contribute approximately 58.65% of the emissions from all types of atmospheric pollution across all three ports. However, emissions per container handled in the port were found to be the lowest in comparison to the other two ports in the study. Potential abatement and mitigation strategies to avoid or reduce these emissions are then analyzed in the light of the results obtained.
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| 7. |
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| 8. |
- Elldér, Erik, et al.
(author)
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Proximity changes to what and for whom? Investigating sustainable accessibility change in the Gothenburg city region 1990–2014
- 2018
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In: International Journal of Sustainable Transportation. - : Informa UK Limited. - 1556-8318 .- 1556-8334. ; 12:4, s. 271-285
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Journal article (peer-reviewed)abstract
- This paper operationalizes the concept of sustainable accessibility by emphasizing the environmental and social dimensions of sustainability from a spatial perspective. In doing so, we develop a heuristic model that focusses on the crucial dimensions of who gets access to what by using sustainable means of movement. We apply our conceptual approach in an examination of trends in sustainable accessibility for different social groups living in Gothenburg, Sweden between 1990 and 2014. On the basis of welfare-related and time-geographical considerations, we investigate accessibility by proximity for low- and high-income earners, people with small children, and elderly people. We investigate to what extent proximity to fundamental facilities increases or decreases over time, indicating changing conditions for sustainability. The results show that opportunities for living a local life and achieving accessibility via proximity differ socially. Low-income earners and the elderly generally live closer to the facilities important for daily life than do high-income earners and parents of young children. We also show that the opportunities for various social groups to obtain access by proximity change over time. For example, we observe a trend in which over time older people face reduced opportunities to reach daily facilities in their local neighbourhoods.
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| 9. |
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| 10. |
- Gössling, Stefan
(author)
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ICT and transport behavior : a conceptual review
- 2018
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In: International Journal of Sustainable Transportation. - : Taylor & Francis. - 1556-8318 .- 1556-8334. ; 12:3, s. 153-164
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Journal article (peer-reviewed)abstract
- Information and communication technologies (ICTs) have considerable importance for transport systems, as they provide access to travel information, planning tools, opportunities to share transport modes, to work at-a-distance, compare transport mode cost, make payment, improve safety and health, and to communicate travel patterns. Over the past decade, there has been massive growth in the availability of transportation ICT, in particular, smartphone applications. There is considerable evidence that ICTs have profoundly changed the ways in which transport systems are perceived and used, and mobilities performed, with far-reaching implications for transport mode choices and transport demand. Against this background, the paper seeks to conceptualize ICT with relevance for transport systems, and to discuss the implications for the environmental sustainability of the transport sector. Findings suggest that while some ICT innovations foster and support sustainable transport choices, others raise new and significant barriers to more sustainable transport futures.
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