CEDEUS

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A behavioural comparison of route choice on metro networks : time transfers crowding topology and socio-demographics
(2014) Raveau Feliú, Sebastián; Guo, Z.; Muñoz Abogabir, Juan Carlos; Wilson, N.; CEDEUS (Chile)
A bumpy ride: structural inequalities, quality standards, and institutional limitations affecting cycling infrastructure
(Elsevier Ltd, 2022) Tiznado-Aitken, Ignacio; Mora Vega, Rodrigo; Oyarzun, Gabriel; Vergara, Jaime; Vecchio, Giovanni; CEDEUS (Chile)
Structural socio-economic and institutional limitations can affect the implementation of cycling infrastructure. More stringent cycling infrastructure standards aiming to solve deficiencies might exacerbate disparities, especially in poor districts with fragmentary governance. Using an audit and quantitative and spatial analysis of cycleways, this paper examines to what extent structural inequalities and governance issues affect the availability and quality of cycling infrastructure, considering new indicative and normative standards aiming at improving cycling infrastructure in Santiago, Chile. Our results show that the distribution of cycleways is unequal and only partially complies with national quality standards. All districts in the city have both high and low standard bicycle lanes, but since district finances have huge differences, this can lead to inequalities in cycle coverage and districts' capabilities to address current standard problems. This raises relevant challenges regarding governance and how to ensure an equitable distribution of cycling infrastructure in Global South cities.
A comparative study of soil metal concentrations in Chilean urban parks using four pollution indexes
(2022) Vega, Alejandra; Arce, Guillermo; Rivera, Javier I.; Acevedo, Sara E.; Reyes Paecke, Sonia; Bonilla, Carlos A.; Pasten Gonzalez, Pablo Arturo; CEDEUS (Chile)
Toxic metal enrichment in urban soils from natural and anthropogenic sources is a public health concern thatchallenges sustainable urban development. Active and legacy mining is likely a major contributor of localizedmetal pollution in resource-based economies, although other sources associated with industrial and trans-portation activities may also contribute in urban settings. In mining countries, such as Chile, with no soil qualityregulation, public policies that seek to protect human health should assess metal distribution and pollution in-dexes to guide interventions, especially in urban green spaces. To assess the role of active and legacy miningwaste sites within the urban and peri-urban areas, metal concentrations in the soils of urban parks weremeasured in this study, and four pollution indexes were calculated for four cities of Chile. Copiap ́o and Andacolloin northern Chile represented the cities with several active and legacy mining waste sites located within theurban and peri-urban areas, while conurbation La Serena-Coquimbo and Gran Santiago represented the cities inmining districts that lacked major mining waste sites within their urban perimeters. A total of 82 (Copiap ́o), 30(Andacollo), 26 (La Serena-Coquimbo), and 59 (Gran Santiago) composite surface soil samples were collectedfrom the urban parks. Considering Canadian guidelines for residential/parkland soils, the value for Cu (63 mg/kg) was found to be exceeded in 99%, 50%, 100%, and 97% of samples collected from Copiap ́o, La Serena-Coquimbo, Andacollo, and Gran Santiago, respectively. The guidelines for lead (140 mg/kg) and zinc (250mg/kg) were exceeded in less than 12% of samples collected from Copiap ́o and Gran Santiago. Arsenic was notmainly quantified (<10% quantification frequency, quantification limit = 36 mg/kg). The calculated modifiedpollution load, Nemerow, and soil quality indexes indicated that soils in the urban parks were more polluted incities with urban mine wastes, however, the pollution load index ranked higher metal pollution in Gran Santiago.This study presented the first comparative study of metals in urban parks of Chile, highlighting a large proportionof parks with soil copper concentrations above the international guidelines, while showing higher median values in cities containing urban mine waste disposal sites.
A comprehensive perspective of unreliable public transport services' costs
(2020) Muñoz Abogabir, Juan Carlos; Soza Parra, Jaime Antonio; Raveau Feliú, Sebastián; CEDEUS (Chile)
A congested and dwell time dependent transit corridor assignment model
(2016) Borja, Alonso; Muñoz Abogabir, Juan Carlos; Ibeas Henríquez, Miguel Ángel; Moura, José, Luis; CEDEUS (Chile)
A critical review of heat and mass transfer in vegetative roof models used in building energy and urban enviroment simulation tools
(2018) Vera Araya, Sergio Eduardo; Pinto, Camilo; Tabares Velasco, Paulo Cesar; Bustamante Gómez, Waldo; CEDEUS (Chile)
A discrete-event public transportation simulation model to evaluate travel demand management impacts on waiting times and crowding conditions
(Elsevier B.V., 2023) Soza-Parra, J.; Tiznado-Aitken, Ignacio; Muñoz Abogabir, Juan Carlos; CEDEUS (Chile)
Several approaches have been proposed and adopted by researchers and decision-makers to improve and deal with public transport operation issues, especially travel demand management (TDM) measures. Disruptions like lockdowns provoked by weather conditions, political riots, special events, natural disaster issues, or the recent COVID-19 pandemic create a need for tools to manage public transport demand and supply o keep users circulating in an efficient, convenient and safe manner. Our work develops a simulation tool of the operations of a public transport system using smart card, GTFS and census data to evaluate the impacts of different intervention scenarios using the pandemic context as a case study. Using a pre-pandemic baseline scenario, we study the impact of several travel demand and public transport supply measures, focusing the analysis on waiting times and crowding conditions inside vehicles and platforms. As a result, we generate easy-to-analyze visual outputs that facilitate prioritizing actions at the metropolitan and district level, identifying where and when waiting times and crowding conditions would exceed certain thresholds.
A flexible and time-efficient schedule-based communication tool for integrated lighting and thermal simulations of spaces with controlled artificial lighting and complex fenestration systems
(2016) Vera Araya, Sergio Eduardo; Bustamante Gómez, Waldo; Molina, G.; Uribe, D.; CEDEUS (Chile)
A global horizon scan for urban evolutionary ecology
(2022) Verrelli, Brian C.; Alberti, Marina; Des Roches, Simone; Harris, Nyeema C.; Hendry, Andrew P.; Johnson, Marc T. J.; Savage, Amy M.; Charmantier, Anne; Gotanda, Kiyoko M.; Govaert, Lynn; Miles, Lindsay S.; Rivkin, L. Ruth; Winchell, Kristin M.; Brans, Kristien I.; Correa, Cristian; Diamond, Sarah E.; Fitzhugh, Ben; Grimm, Nancy B.; Hughes, Sara; Marzluff, John M.; Munshi-South, Jason; Rojas Quezada, Carolina Alejandra; Santangelo, James S.; Schell, Christopher J.; Schweitzer, Jennifer A.; Szulkin, Marta; Urban, Mark C.; Zhou, Yuyu; Ziter, Carly; CEDEUS (Chile)
The impact of urbanization on biodiversity has been well documented, yet research into the complex dynamics of ecological and evolutionary processes in urban areas is still in its infancy. When novel research challenges emerge, a horizon scan exercise is an integrated approach that brings together global interdisciplinary-minded individuals to identify future research questions that can influence new collaborations and funding agenda. Our horizon scan identified 30 questions for future research in urban evolutionary ecology covering themes in fundamental ecological and evolutionary processes, temporal and spatial scales, sustainability, climate change, sociopolitical and ethical considerations, and innovation in technology. Research on the evolutionary ecology of urban areas reveals how human-induced evolutionary changes affect biodiversity and essential ecosystem services. In a rapidly urbanizing world imposing many selective pressures, a time-sensitive goal is to identify the emergent issues and research priorities that affect the ecology and evolution of species within cities. Here, we report the results of a horizon scan of research questions in urban evolutionary ecology submitted by 100 interdisciplinary scholars. We identified 30 top questions organized into six themes that highlight priorities for future research. These research questions will require methodological advances and interdisciplinary collaborations, with continued revision as the field of urban evolutionary ecology expands with the rapid growth of cities.
A greener urban environment: designing green infrastructure interventions to promote citizens’ subjective wellbeing
(Elsevier B.V., 2019) Navarrete-Hernández, Pablo; Laffan, Kate; CEDEUS (Chile); Pontificia Universidad Católica de Chile. Facultad de Arquitectura, Diseño y Estudios Urbanos
Research using subjective wellbeing (SWB) measures finds that the greener an individual's local environment is, the higher the levels of happiness and the lower levels of stress they tend to report experiencing. This literature presents positive associations between existing large-scale green spaces, such as urban parks or squares, and the wellbeing of residents living in close proximity to them. In contrast, in the current work, we present a novel approach which combines SWB measures with photo simulation in order to examine the impact of street-level green infrastructure interventions on the people's perceptions of the SWB associated with urban sites. We tested the approach with the attendees of the 20th Biennale on Architecture and Urbanism in Chile in 2017, exploring the impact of four different types of street-level green interventions. The results indicate that all types of green interventions considered significantly increase the perceived happiness and reduce the perceived stress associated with the sites during short exposures, with varying effect sizes across different types and scales of interventions. The proposed technique could be used in urban planning processes to examine the potential SWB benefits of green infrastructure investments prior to their being rolled out.
A long panel survey to elicit variation in preferences and attitudes in the choice of electric vehicles
(2014) Jensen, A.; Cherchi, E.; Ortúzar Salas, Juan de Dios; CEDEUS (Chile)
A method for solving the multi-objective transit frequency optimization problem
(2016) Giesen Encina, Ricardo; Martínez, H.; Mauttone, A.; Urquhart, M.; CEDEUS (Chile)
A New Method to Determine How Compaction Affects Water and Heat Transport in Green Roof Substrates
(2019) Victoria Sandoval; Suarez Poch, Francisco; CEDEUS (Chile)
A new solution framework for the limited-stop bus service design problem
(2017) Soto, G.; Larraín Izquierdo, Homero; Muñoz Abogabir, Juan Carlos; CEDEUS (Chile)
A Novel Offsite Construction Method for Social Housing in Emerging Economies for Low Cost and Reduced Environmental Impact
(MDPI, 2023) Tapia Reed, Danilo Alejandro; González Hormazábal, Marcelo Andrés; Vera Araya, Sergio Eduardo; Aguilar, Carlos; CEDEUS (Chile)
Offsite construction methods have shown many advantages over traditional construction techniques, especially related to efficiency and productivity during the construction phase. Nevertheless, offsite construction generally involves oversizing the internal structure of the modules due to the internal stresses produced during transport and lifting operations, producing an increase in material usage, direct cost, and carbon footprint. In developing countries, the direct cost of social housing is the most important factor determining the feasibility of construction. For this reason, oversizing the internal structure of the modules can play an important role in the adoption of a modern construction technique such as offsite construction systems. In order to solve this issue, a temporary reusable stiffener structure is proposed to allow an economical offsite construction system using a lightweight steel framing structure used in traditional methods. The reusable structure was designed using a finite element method, and the direct cost and carbon footprint of the structure were evaluated. The results show that the proposed construction strategy allows for a low cost and reduced environmental impact due to a lower usage of materials in the modules and the possibility of a circular economy approach to the reusable structure.
A polarized logit model
(2013) De Grange, Louis; González, Felipe; Vargas Cucurella, Ignacio Tomás; Muñoz Abogabir, Juan Carlos; CEDEUS (Chile)
A quasi-equilibrium approach for market clearing in land use microsimulations
(2017) Hurtubia González, Ricardo; Martínez, F.; Bierlaire, M.; CEDEUS (Chile)
A stochastic model for bus injection in an unscheduled public transport service
(2020) Morales Navarrete, Diego Fabián; Muñoz Abogabir, Juan Carlos; Gazmuri S., Pedro; CEDEUS (Chile)
A trade-off analysis between penetration rate and sampling frequency of mobile sensors in traffic state estimation
(2014) Bucknell Riderelli, Christopher Paul; Herrera Maldonado, Juan Carlos; CEDEUS (Chile)
A zonal inference model based on observed smart-card transactions for Santiago de Chile
(2016) Tamblay, S.; Galilea Aranda, Patricia Viviana; Iglesias, P.; Raveau Feliú, Sebastián; Muñoz Abogabir, Juan Carlos; CEDEUS (Chile)

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