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Trabajo presentado en: R-Evolucionando el transporte, XIV Congreso de Ingeniería del Transporte (CIT 2021), realizado en modalidad online los días 6, 7 y 8 de julio de 2021, organizado por la Universidad de Burgos, A la hora de planificar nuevas vías, es importante utilizar todas las herramientas que estén a nuestro alcance para optimizar su diseño, de modo que no caigamos en infra o sobredimensionamientos, que pueden provocar un funcionamiento peor al esperado o un coste mucho mayor al necesario, respectivamente. Por ello, las herramientas de macrosimulación de tráfico pueden ser un interesante apoyo para este fin. En el presente artículo, se va a exponer un caso práctico en el que el empleo de dichas herramientas informáticas ha permitido realizar un dimensionamiento más idóneo en cuanto al número de carriles de una nueva vía. En concreto, se trata del Estudio Informativo de la Autovía Orbital B-40, en el que se han utilizado técnicas de macrosimulación de tráfico para estimar las captaciones de demanda de las diferentes alternativas consideradas, y para finalmente calcular el Nivel de Servicio previsto en cada una de ellas en los diferentes horizontes temporales establecidos. Los resultados obtenidos han permitido afinar el diseño de dicha Autovía, y la metodología empleada puede ser un ejemplo válido para otros casos de estudio similares., Este artículo está basado en el Proyecto de Investigación denominado “Simulación y Análisis de Tráfico dentro del Estudio Informativo de la Autovía Orbital B-40”, contratado por la empresa GPYO INNOVA, S.L. la elaboración del citado Estudio de Tráfico, y realizado por Universidad de Burgos.

Trabajo presentado en: R-Evolucionando el transporte, XIV Congreso de Ingeniería del Transporte (CIT 2021), realizado en modalidad online los días 6, 7 y 8 de julio de 2021, organizado por la Universidad de Burgos, Previous research has studied possible links between different urban environments and induced mobility. The traditional Spanish city patterns have specific features that promote the use of soft modes, mainly favouring pedestrian presence in the streets. Nevertheless the last twenty years development has changed the previous urban reality in many towns, following some sprawl characteristics and occupying much more land than strictly necessary. Accordingly, we have analyzed the morphology of Burgos using the perspective of urban fabric differences. Focusing in some parameters such as density of dwellings, population and compactness, we have tried to understand the underlying correlation between urban environment and private car trip generation. However, although some of these urban variables can be considered as quantitative and quick indicators for unsustainable modes of transport, the effects of compact or diffuse development cannot be figured without taking into consideration other parallel factors that configure urban vitality. A previous qualitative analysis of urban growth and development may help to grasp this reality, connected with design criteria trends and urban planning policies. Likewise, mobility cannot be completely understood if only quantitative correlation is prosecuted. The retail distribution or concentration, the presence of malls, the excessive streets broadness, the existence and size of open spaces, or the residential building typologies have verifiable impact on the final modal share. Our results show clear correspondence between low dense urban fabrics and higher number of car trips. Hence, future urban development and reform policies must be oriented if sustainable mobility objectives want to be fulfilled. We suggest some final recommendations with this aim.

Trabajo presentado en: R-Evolucionando el transporte, XIV Congreso de Ingeniería del Transporte (CIT 2021), realizado en modalidad online los días 6, 7 y 8 de julio de 2021, organizado por la Universidad de Burgos, The purpose of this research was to study the feasibility of incorporating steel slags into coarse bituminous mixtures. The objective was twofold: to reduce dependence on natural aggregates, and to provide a use for industrial by-products. The slags studied come from the manufacture of carbon steel in electric furnaces and are divided into two types: Electric Arc Furnace (EAF) slag and Ladle Furnace (LF) slag. The mixture designed is coarse bituminous concrete (AC22G), for base courses in flexible pavements. In a first phase, the physical characterization of the materials was carried out to check their suitability. In a second phase, three types of mixes were designed: a control mix (made with natural limestone aggregates), a mix where LF slag was introduced to replace the filler and the fine fraction (sand) of the mix; and finally, the feasibility of manufacturing a totally sustainable mix was analyzed, which would fully incorporate EAF slag as coarse aggregate and LF slag as fine aggregate and filler. In a third and final phase, the designed mixes were subjected to different mechanical, water sensitivity, and durability tests. The research demonstrated that the incorporation of EAF and LF steel slag as a substitute for natural aggregate in coarse bituminous mixtures is feasible, meeting regulatory requirements, improving sustainability in the construction industry, as well as reducing emissions, and contributing to climate change mitigation., This work was supported by the Junta de Castilla y León (Regional Government) and ERDF [grant number UIC-231, BU119P17] and the University of Burgos [grant number SUCONS, Y135.GI].