Marginal benefit to South Asian economies from SO2 emissions mitigation and subsequent increase in monsoon rainfall

Sulphate aerosols are dominated by SO2 emissions from coal-burning for the Indian electricity sector and they are thought to have a short term but significant, negative impact on South Asian Summer Monsoon rainfall. This reduction in precipitation in turn can lead to reduced economic outputs, primarily through smaller agricultural yields. By bringing together estimates of (a) the impact of sulphate aerosols on precipitation and (b) the observed relationship between monsoon rainfall and GDP, we present a methodology to estimate the possible financial cost of this effect on the Indian economy and on its agricultural sector. Our preliminary estimate is that the derived benefits could be large enough that around 50% of India’s SO2 emissions could be economically mitigated at no cost or net benefit, although it should be noted that the large uncertainties in the underlying relationships mean that the overall uncertainty is also large. Comparison of the 1952–1981 and 1982–2011 periods indicates that the Indian economy may now be more resilient to variability of the monsoon rainfall. As such, a case could be made for action to reduce SO2 emissions, particularly in the crucial monsoon period. This would have a significant, positive effect on a crucial and large sector in India’s economy and the effects would be visible almost instantly. The recent growth in renewable energy sources in India and the consequent, reduced increase in coal burning means that further financial costs have already been avoided. This impact should be further investigated so that it can be included in cost-benefit analyses of different fuel types in the region. The significant uncertainties associated with these calculations are discussed

Decision-making in sustainable uban mobility planning: Common practice and future directions

This paper highlights the challenges for cities in selecting sustainable and cost-effective transport and mobility measures. Thereby it shall provoke thought on the implications for decision-making resulting from Sustainable Urban Mobility Plans. Firstly, an understanding of the challenges of determining a transport project’s viability will be conveyed. Secondly, the paper presents five case studies of sustainable urban mobility planning and the role of project appraisal in those policy-making processes.In discussing the challenges of traditional project-appraisal and examining actual local decision-making, the paper finds some crucial challenges in the appraisal of small-scale sustainable transport activities. It concludes by highlighting potential implications of these

Development of an Index of Transport-User Vulnerability, and its Application in Enschede, The Netherlands

An index of accessibility-based vulnerability is created based on a definition of transport-user vulnerability regarding transport accessibility created for the EMPOWER project, in order to assess the project’s key performance indicator of the inclusion of vulnerable people in the project’s scheme. The objective of the index is to account for various individual vulnerability aspects, but also for the ‘multi-dimensionality’ of vulnerability, i.e. individuals may be vulnerable because of one specific aspect (e.g., disability), or they may be vulnerable because of multiple aspects which, if assessed in isolation, wouldn’t classify the individual as vulnerable. Users of the project scheme in the Dutch city of Enschede are surveyed on, inter alia, their vulnerability based on this definition, according to their income, mobility budget, physical mobility, age, gender, living situation, nation of birth, and education. According to individual questions, 1% to 54% (single parents and females, respectively) of respondents have some level of vulnerability. According to the index, 23–36% of respondents can be considered to be vulnerable. Suitably modified for local conditions, the index is relevant to cities, especially quickly developing cities where congestion reduction is or has been a priority, insofar as it offers a way of measuring and monitoring the vulnerability of the users of their transport system. Finally, steps to adapt the index to other settings (cities or countries) are discussed

Need for a holistic assessment of urban mobility measures : review of existing methods and design of a simplified approach

The lack of suitable tools to assess sustainable mobility measures' costs, benefits and overall impacts is a significant factor impeding their implementation. Cost-benefit analysis (CBA) is often applied to large-scale infrastructure projects, but does not capture all relevant socio-economic impacts. Small-scale but potentially highly cost-effective measures often do not have the critical mass to warrant a thorough cost-benefit analysis. This paper reviews existing assessment methodologies, including their advantages, limitations and application to different urban mobility measures, and current assessment practice in cities based on survey results. Based on these analyses, a holistic approach for project appraisal is proposed, consisting of aspects of a multi-criteria analysis (MCA) and CBA and applicable to a variety of urban mobility measures

Life-cycle assessment of Brazilian transport biofuel and electrification pathways

Biofuels and electrification are potential ways to reduce CO2 emissions from the transport sector, although not without limitations or associated problems. This paper describes a life-cycle analysis (LCA) of the Brazilian urban passenger transport system. The LCA considers various scenarios of a wholesale conversion of car and urban bus fleets to 100% electric or biofuel (bioethanol and biodiesel) use by 2050 compared to a business as usual (BAU) scenario. The LCA includes the following phases of vehicles and their life: fuel use and manufacturing (including electricity generation and land-use emissions), vehicle and battery manufacturing and end of life. The results are presented in terms of CO2, nitrous oxides (NOx) and particulate matter (PM) emissions, electricity consumption and the land required to grow the requisite biofuel feedstocks. Biofuels result in similar or higher CO2 and air pollutant emissions than BAU, while electrification resulted in significantly lower emissions of all types. Possible limitations found include the amount of electricity consumed by electric vehicles in the electrification scenarios

Evaluation and appraisal of sustainable and integrated urban transport projects

Investments in urban transport should deliver the maximum economic, social and environmental benefits; in times of constrained budgets, projects' economic viability is often the deciding factor. This paper discusses the current practices and challenges facing cities in assessing urban transport interventions. On this basis, it develops options for decision-makers to appraise small-scale, sustainable urban transport policy measures. The analysis of current appraisal practice shows that data requirements and complexity are cities’ main obstacles appraising projects and comparing potential alternatives. Additionally, there is often a risk that project appraisal enters the planning process too late to play any meaningful role. Conducting a Cost-benefit analysis (CBA) ex-ante is often only approved if the implementation of the measure in question is already likely. Often, a CBA is a means to access funds rather than a basis for decision-making. Project appraisal of small-scale and non-infrastructure-based measures is often simply too expensive. On the basis of these findings, the paper discusses the following alternatives to comprehensive CBAs: 1) learn from others, 2) use a simplified assessment method, 3) rely on norms and values. All of these options aim to cope with the trade-off between effort and certitude. In practice, some policy-makers may already apply one or more of these options, but this has not been documented in a systematic manner. A systematic documentation of such practices could be a major step forward for implementation of sustainable and integrated urban transport projects, as it would shed some light on the reasoning behind decisions, from which conclusions could be drawn on the likely follow-on effects thereof and also possible improvements to the process

Urgent Biophilia: Green Space Visits in Wellington, New Zealand, during the COVID-19 Lockdowns

Urgent biophilia describes the conscious desire of humans to seek interactions with nature during periods of stress. This study examines the changes in frequency and reason for visiting urban green spaces by residents of Wellington, New Zealand, to determine whether resident behavior during a stressful period exemplifies the principles of urgent biophilia. The COVID-19 pandemic and resulting lockdowns were used as the study period due to the significant physical and mental health stressors they triggered. Pedestrian and cyclist counters located in key urban green spaces in Wellington were used to collect data on visits pre- and post-pandemic. Two surveys were used to assess residents’ reasons for visiting urban green spaces during lockdowns. Increased green space visits were seen during the strictest lockdowns, though there was some variation in visits depending on the location of the green space. The most frequently reported reason for visiting green spaces during lockdown was mental wellbeing, followed by recreation. These results suggest that Wellington residents used urban green spaces as a coping mechanism during stressful lockdown periods for wellbeing benefits, exemplifying the principles of urgent biophilia. Urban planners and policymakers must consider and implement urban green infrastructure as a public health resource

Metrasys, Sustainable Mobility for megacities - Traffic Management and Low-Carbon Transport for Hefei, China

Das Projekt METRASYS – Sustainable Mobility for Megacities ist eines von zehn Projekten, die durch das BMBF im Rahmen des Förderschwerpunktes "Forschung für nachhaltige Entwicklung der Megastädte von morgen - Energie- und klimaeffiziente Strukturen in urbanen Wachstumszentren" gefördert werden. Es bearbeitet mit dem Bereich Mobilität und Verkehr eines der drängendsten Probleme in heutigen und zukünftigen Megastadt-Regionen