scholarly journals Material Application Methodologies for Winter Road Mobility: A Renewed Perspective

Author(s):  
Sen Du ◽  
Michelle Akin ◽  
Dave Bergner ◽  
Gang Xu ◽  
Xianming Shi

Winter road maintenance operations, commonly known as snow/ice control operations, are one of the most critical functions of state, provincial and local transportation agencies in cold regions. These operations aim to provide safety and mobility by timely and effective application of materials and plowing. The most common materials used are salt (sodium chloride, solid and brine), magnesium chloride-based, and calcium chloride-based deicers, agro-based additives and blends, and abrasives. In practice, the specific choice and application method and rate of these materials dependent on temperature, precipitation type, level of service goals, budget, and environmental sustainability. Best practices of material application are designed to apply the right type and amount of materials in the right place at the right time. This review presents the literature review and agency interviews that were conducted to assemble the information about the use of materials, including types of materials, application tactics, application rates, and application equipment.

ICTE 2011 ◽  
2011 ◽  
Author(s):  
Chaozhe Jiang ◽  
Jianchen Zheng ◽  
Jiajun Liu ◽  
Lu Wu ◽  
Jin Yang

Author(s):  
Maged Gouda ◽  
Karim El-Basyouny

Canadian municipalities are increasingly choosing to achieve bare pavement (BP) for snow and ice control during fall/winter seasons. When a snowstorm event is forecasted, one strategy is to apply anti-icing chemicals to the pavement surface to prevent the snow and ice from forming a bond with the road surface. Such an approach facilitates a more efficient plowing operation and reduces the amount of deicing chemicals needed to achieve BP. This study assesses the safety performance of achieving BP using anti-icing compared with the traditional reactive winter road maintenance (WRM) approach on urban roads using the before-and-after Empirical Bayes technique. Results suggest that achieving BP significantly reduces all collision types and severities on midblocks with a reduction value in the range of 13.7% to 19.7%. Attaining BP at intersections was found to be very effective in reducing injury collisions with an estimated reduction of 12.5%. When sites were grouped based on a WRM priority-basis, it was found that anti-icing was effective for reducing the majority of collision types and severities at the different priority levels with reductions ranging from 8.7% to 49.83% on midblocks and between 5.37% and 13% at intersections. All reductions were statistically significant. The monetary benefits of the reductions in property-damage only and nonfatal injury collisions were estimated at 60 million Canadian dollars using a 1.92% interest rate and a 2-year service life. These findings provide unequivocal evidence that achieving BP using anti-icing can lead to significant societal safety benefits that economically translate to huge collision cost savings.


Author(s):  
Т. В. Самодурова ◽  
О. В. Гладышева ◽  
Н. Ю. Алимова ◽  
Е. А. Бончева

Постановка задачи. Рассмотрена задача моделирования отложения снега во время метелей на автомагистралях с барьерными ограждениями в программе FlowVision . Результаты. В качестве опытного участка рассмотрен участок автомагистрали, проходящий в насыпи. Создана геометрическая модель участка автомагистрали. Обоснованы информационные ресурсы для создания гидродинамической модели обтекания насыпи автомагистрали с барьерными ограждениями снеговетровым потоком во время метелей. Проведено моделирование процесса снегонакопления на опытном участке с использованием программного комплекса FlowVision во время метелей с различными параметрами. Выводы. Сделан вывод о возможности применения программного комплекса FlowVision для совершенствования методики назначения снегозащитных устройств и определения параметров снегоочистки при зимнем содержании автомобильных дорог. Statement of the problem. The problems of snow deposit modeling on the highways with crash barriers during blizzards in the FlowVision was discussed. Results. The highway section passing in the embankment as an experimental section has been considered. The geometric model of the highway section was created. The information resources for designing a hydrodynamic model of a snowflow stream of highway embankment with barriers during blizzard were identified. The modeling of the snow deposit process in the experimental section using the FlowVision software during blizzards with different parameters was carried out. Conclusions. It was concluded that it is possible to use the FlowVision software to improve the methodology for snow protection designing and determining snow removal parameters for winter road maintenance.


2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 858-858
Author(s):  
Suzanne Meeks

Abstract The GSA publications team sponsors this annual symposium to assist prospective authors to successfully publish their gerontological scholarship in GSA’s high impact and influential journals. The first part of the session will include five brief presentations from the Editors-in-chief of Journals of Gerontology-Series B, Social and Psychological Sciences, The Gerontologist, and Innovation in Aging, plus one of GSA’s managing editors. We will integrate practical tips with principles of publication ethics and scholarly integrity. The topics will be as follows: (1) preparing your manuscript, including how to choose the right journal; (2) strong and ethical scholarly writing for multidisciplinary audiences; (3) transparency, documentation, and Open Science; (4) successfully responding to reviews; and (5) working with Scholar One. Following these presentations, we will hold round table discussions with editors from the GSA journals portfolio. At these roundtables, editors will answer questions related to the podium presentations and other questions specific to each journal. Intended audiences include emerging and international scholars, and authors interested in learning more about best practices and tips for getting their scholarly work published.


2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Rashmi Shivni ◽  
Christina Cline ◽  
Morgan Newport ◽  
Shupei Yuan ◽  
Heather E. Bergan-Roller

Abstract Background Seminal reports, based on recommendations by educators, scientists, and in collaboration with students, have called for undergraduate curricula to engage students in some of the same practices as scientists—one of which is communicating science with a general, non-scientific audience (SciComm). Unfortunately, very little research has focused on helping students develop these skills. An important early step in creating effective and efficient curricula is understanding what baseline skills students have prior to instruction. Here, we used the Essential Elements for Effective Science Communication (EEES) framework to survey the SciComm skills of students in an environmental science course in which they had little SciComm training. Results Our analyses revealed that, despite not being given the framework, students included several of the 13 elements, especially those which were explicitly asked for in the assignment instructions. Students commonly targeted broad audiences composed of interested adults, aimed to increase the knowledge and awareness of their audience, and planned and executed remote projects using print on social media. Additionally, students demonstrated flexibility in their skills by slightly differing their choices depending on the context of the assignment, such as creating more engaging content than they had planned for. Conclusions The students exhibited several key baseline skills, even though they had minimal training on the best practices of SciComm; however, more support is required to help students become better communicators, and more work in different contexts may be beneficial to acquire additional perspectives on SciComm skills among a variety of science students. The few elements that were not well highlighted in the students’ projects may not have been as intuitive to novice communicators. Thus, we provide recommendations for how educators can help their undergraduate science students develop valuable, prescribed SciComm skills. Some of these recommendations include helping students determine the right audience for their communication project, providing opportunities for students to try multiple media types, determining the type of language that is appropriate for the audience, and encouraging students to aim for a mix of communication objectives. With this guidance, educators can better prepare their students to become a more open and communicative generation of scientists and citizens.


2021 ◽  
Vol 13 (9) ◽  
pp. 5069
Author(s):  
Aitziber Egusquiza ◽  
Mikel Zubiaga ◽  
Alessandra Gandini ◽  
Claudia de Luca ◽  
Simona Tondelli

This paper presents the result of the analysis of the data gathered from 20 Role Models (RM) case studies regarding their successful heritage-led rural regeneration models. For the study and comparison of the narratives of these Role Models two tools were used: the Community Capitals Framework, which studied the transference of capitals in each process and the identification of six Systemic Innovation Areas that allow this capital transference. A multilevel repository of best practices has been developed allowing the identification of common features, mechanisms for mobilisation of capitals and required resources that will facilitate the replication in other rural areas. The results of this work support the acknowledgement of the contribution of culture, together with cultural and natural heritage, to economic growth, social inclusion and environmental sustainability in rural areas reinforcing the role of culture as the fourth pillar of sustainable development.


1997 ◽  
Vol 21 (1) ◽  
pp. 71-99 ◽  
Author(s):  
Richard C. Morey ◽  
David A. Dittman

The “go/no-go” decision for a candidate property, i.e., whether or not to actually acquire the site, choose the brand (flag), build and operate the hotel, requires the explicit consideration of the interconnectedness of the many myriad elements affecting the property's potential profits. The many facility design decisions (number and mix of rooms, capacity for F&B operations etc.) as well as other strategic choices (e.g., size of marketing program, level of service aimed for) must recognize the site's competitive features and interactions with the above. Also, the particular design and operational features for a given property will affect its different revenue streams, fixed and variable costs, efficiency and profits. The authors consider developers contemplating acquiring a given site, choosing a brand, building and operating a new hotel. They offer a normative approach for this type of decision which arrives endogenously at possibly attractive options for the brand, design and strategic choices for the site. The final decision as to which option to actually use, if any, should be based on subjecting the above identified scenarios, as well as others, to traditional feasibility analyses where judgment and expert opinion are applied. The authors' implementable approach integrates a “best practices” benchmarking methodology with regression analysis to yield a mathematical programming optimization model. A key advantage of this approach lies in its contrast to conventional approaches for site selection which often ignore the more detailed design and strategic choices. The approach deals explicitly with the complex interfaces between marketing and operations management as the endogenous site and competitive environmental factors interact with the endogenous brand and facility design choices. By identifying attractive options to be further explored (that might otherwise be overlooked), several types of errors are avoided: i) an incorrect “go/no go” decision could be recommended for the site in question; ii) even if the right decision to proceed is made, the forecasted level of annualized profits could be in error, leading to an incorrect priority for the activity; iii) the incorrect brand and facility design choices could be made for the site. Other key advantages of the suggested approach are that 1) various substitution possibilities (between more or less capital, labor, materials etc.) are considered; 2) not only is the best brand and configuration identified, but also a ranking of other brands is available if the “best” brand is not available; 3) the “best practices” at other specific sites (which serve as the basis for the recommendations) are identified, thereby enabling management (possibly through site visits) to isolate the actual cultures, processes and procedures to be transported and emulated at the candidate site. This paper illustrates the approach for two different sites.


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