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The article offers information on the Dominican government's presentation of the Santo Domingo Integrated Transportation System (SIT-SD), a project addressing traffic congestion and mobility issues in the capital city, with an estimated investment of 3.2 billion dollars. Topics include the initiative's focus on reducing private vehicle traffic and promoting collective transportation by connecting the entire metropolitan region of Greater Santo Domingo through a public-private partnership model.

Copyright of Revista Cubana de Ciencias Informáticas is the property of Universidad de las Ciencias Informaticas (UCI) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Introduction: environmental pollution in urban areas is mainly due to greenhouse gas emissions from the burning of fuel in the vehicle fleet, which increases in situations of vehicle congestion, which, in addition to being a source of noise pollution, affects the physical and mental health of citizens. Objective: to determine the perception of independent urban transport consultant experts on the causes of vehicle congestion and its relationship with environmental pollution and health. Materials and methods: an observational and descriptive study in the city of metropolitan Lima, through the identification of critical points of vehicular congestion and through structured interviews with independent consultants, on the causes of traffic, environmental pollution and health. Results: the main traffic generators observed were constructions, closed streets, ambulatory commerce, informal stops, unauthorized parking, and accidents. While the causes of congestion, identified by the consultants, were based on poor management and road planning, lack of road safety education for drivers and pedestrians, informal stops, and obsolete vehicles. Conclusions: the capital city still suffers from high levels of traffic congestion, which affects the health and economy of Peruvians. From the analysis based on the opinions of experts, it is recommended that strategies and policies be directed towards solutions that include institutional reforms that favor improvements in efficiency and effectiveness in the management of urban transportation, facilitate the renewal of the vehicle fleet and implement awareness campaigns to create a citizen culture. [ABSTRACT FROM AUTHOR]

Copyright of Cuadernos de Vivienda y Urbanismo is the property of Pontificia Universidad Javeriana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de Economía (Universidad Autónoma de Yucatán) is the property of Universidad Autonoma de Yucatan, Facultad de Economia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Road construction in or near natural areas has been identified as a major cause of habitat loss and fragmentation worldwide. In the department of Valle del Cauca, Colombia, two road corridors in different stages of development run from the city of Cali to the Buenaventura seaport. A research project was developed in two phases to evaluate and quantify the impacts these roads have on the wild fauna populations in the area: corridor modeling and field validation. Interactions between wildlife populations and these road corridors were evaluated and quantified by modelling the corridors with information from geographic information systems (GIS) supported by field data on drainage structures, road traffic jams and photo trapping records. Four priority crossing areas were identified for nine mammal species. After evaluating 738 road structures, 19 species were recorded using these road structures and 38 species were run over on both roads. These roads differ in structures and layouts, however, their problems are shared, such as the lack of pre-existing road structures suitable for the passage of fauna, their use as a refuge and the poorly structured development on their periphery are the causes of the barrier effect that limits connectivity and gene flow of animals in this area. [ABSTRACT FROM AUTHOR]

Copyright of Inventum. Ingenieria, Tecnologia e Investigacion is the property of Corporacion Universitaria Minuto de Dios and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Las medidas de gestión de la demanda han sido muy populares para solucionar los problemas de congestión y emisiones que genera el transporte. En Bogotá y muchas ciudades latinoamericanas, estas disposiciones se han centrado en las restricciones al uso del vehículo privado a través de medidas como el pico y placa, sin generar resultados efectivos en el largo plazo. La pandemia de COVID-19 abre la oportunidad de implementar medidas efectivas para la solución de estos problemas. Este artículo se centra en los impactos que tendría la restructuración permanente de horarios de trabajo en la reducción de la congestión en el transporte público y en los modos privados, a partir de modelaciones de viajes usando datos de la Encuesta de Movilidad 2019 de Bogotá. [ABSTRACT FROM AUTHOR]

The impact on travel time generated by redirection of roads in the gastronomy sector of Manizales, Colombia is analyzed. The objective of the study is to help in solving or contributing to a solution of the problems of mobility, trying of eliminating traffic congestion, low parking offer and the high demand of users. These factors make it difficult the normal transit of vehicles and pedestrians. The study is based on the use of global average accessibility and integral accessibility, as elements of calculation and the methodology of estimating the impact generated by intervention. As a result, 100% of population could reach the gastronomy sector in a travel time of less than 45 minutes. [ABSTRACT FROM AUTHOR]

The article seeks to study the congestion of the city of Cali. For this a transdisciplinary analysis of the historical development of the municipality is exposed in a context of long duration, to later derive in the ordering plans of the 21st century, and to present the current traffic problem. In this historical context, urban plans, programs, and projects have tried within the framework of territorial public policies to define a city model. However, the evidence shows in Cali there is no articulation between the territorial policies of the twentieth century and the way the city government conceived it for the 21st century. Therefore, regarding this territorial discontinuity development, the chaos of vehicular congestion is shocking, which in turn translates into serious problems of institutional ungovernability, as the present study suggests. [ABSTRACT FROM AUTHOR]

This paper analyzes the vehicular mobility in 3 specific points of the municipalities of Riohacha and Maicao, La Guajira Colombia. Variables of vehicular flow such as queue arrival times, density, permanence, infractions and other implicit ones were used. Observation and description processes are carried out over four continuous months in critical hours; the flow variables that affected the selected points, causes and effects were identified and described, which are represented using influence diagrams. The whole process was simulated, using high performance software such as PTV Vissim 8 and Vensim PLE. It is recognized that the vehicular mobility in the studied points, the congested genres due to the high frequency of vehicles that transit and that the current traffic regulations are something that don't help enough to improve the flow. In addition to infractions, accidents and situations of intolerance, toxicity is generated in the environment by the emission of CO2 by vehicles waiting at each critical point, matters to which authorities still do not pay attention. [ABSTRACT FROM AUTHOR]

Copyright of Mexican Journal of Economics & Finance / Revista Mexicana de Economia y Finanzas is the property of Instituto Mexicano de Ejecutivos de Finanzas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Historia Contemporanea is the property of Historia Contemporania and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study measures the influence of public bus services on traffic congestion and environmental pollution in Lima and Callao. The effect of the flow of buses on the transportation network is measured by way of a dynamic traffic assignment program, Dynasmart. The database is constructed on the basis of the 2005-2025 Master Plan. To this end, the transportation network is verified using Google Earth, and field measurements of capacity, speed, and volume-delay functions to describe traffic congestion are used. The flow of buses is calculated using the Emme3 program. Origin-destination matrices are calculated for each hour based on the 24-hour origindestination matrix from the Master Plan. In the case of congestion, both the exact and the maximum influence of the flow of buses are measured, and the case of segregating a traffic lane for a Rapid Bus System--a much-discussed topic--is also considered. In the case of pollution, the exact influence of the flow of buses is used to measure fuel consumption and pollutant emissions for the option of reducing public bus services as well as a further five options, including the implementation of a Rapid Bus System featuring gas-powered buses. It is found that halving the size of the bus fleet increases the speed of the transportation network by between 2 and 7% per day, and between 9 and 14% until 11 am, and yields 46% of the benefits of promoting clean fuels and inspection and maintenance; that is, that this measure is of limited worth in reducing congestion, and should not be considered a priority means of alleviating pollution. [ABSTRACT FROM AUTHOR]

The last stage of classical transport modelling, known as the sequential model of the four steps, estimates the flow pattern of the system. Then, in a post-processing phase all measures of system performance such as the level of service and externalities are estimated. This paper compares the estimated BPR and conical volume-delay with data taken in six multilane roads in Bogota, finding ranges of recommended function parameters values. We concluded that the values traditionally used for these functions are not the best for explaining the congestion that occurs in the environment studied. [ABSTRACT FROM AUTHOR]

Today the most cities in the world face different problems caused by vehicular traffic due to the increasing number of vehicles on road, such as traffic congestion, environmental pollution, excessive noise, increased accidents on the road, etc. Therefore it is important to represent the phenomenon by applying models so as to find better traffic flow patterns in a given city. In this work we introduce a simple macroscopic model to describe traffic flow in traffic congestion and we obtain the equation that relates the characteristic behavior between traffic flow and traffic density, known in the literature as fundamental relationship. Finally, we find an analytical solution for optimal flow passing vehicles on a congested road section. [ABSTRACT FROM AUTHOR]

Copyright of Dimensión Empresarial is the property of Universidad Autonoma del Caribe, Departamento del Atlantico and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Cuadernos de Vivienda y Urbanismo is the property of Pontificia Universidad Javeriana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Urban freight transport has gained increasingly importance in today's world, where not only its contribution to the economic and social dynamics has been recognized, but also its negative externalities such as traffic congestion, energy consumption, pollution and road accidents. The aim of this paper is to globally evaluate the urban freight transport system within the metropolitan area of Queretaro (Mexico), particularly in relation with the public policies. The research puts into context the transport of goods in cities and the methodological efforts looking at assessing or monitoring of its effects. In the experimental aspect, this work introduces a new method together with its use in the geographical area of study. Results show a deficient performance in relation with the fulfillment of the proposed index concerning the international practices, mainly due to a lack of problem awareness on the part of national and local authorities. It is concluded that this method can serve as an aid to public administrations in diagnosing and intervening, on the basis of a paradigmatic shift in the way the problem is faced. [ABSTRACT FROM AUTHOR]

Copyright of Safety & Fire Technology / Bezpieczeństwo i Technika Pożarnicza is the property of Centrum Naukowo-Badawcze Ochrony Przeciwpozarowej and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of RISTI: Iberian Journal on Information Systems & Technologies / Revista Ibérica de Sistemas e Tecnologias de Informação is the property of Associacao Iberica de Sistemas e Tecnologias de Informacao (AISTI) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Experimenting with different methods of traffic assignment is presented, using prototype network traffic. 21 simulations were performed, using seven methods of allocating three levels of traffic. We use the following traffic assignment methods: All-or-Nothing Assignment, Stochastic Assignment, Incremental Assignment, Capacity Restraint, User Equilibrium, Stochastic User Equilibrium and System Optimum Assignment. We use three kinds of matrixes: a dense, half and half empty. In networks that are not congested, the results show that is indifferent to use one or another traffic assignment method, as the results converge to the system optimum assignment equilibrium. [ABSTRACT FROM AUTHOR]

Copyright of Revista de Economía Aplicada is the property of Revista de Economia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The main goal of this research was to characterize the range of noise pollution in Bogota. To achieve such objective, we selected eight microenvironments and several roadways in different zones of the city. In the selected locations, we conducted sound pressure measurements and documented the traffic congestion using a digital video camera. 75% of the time the determined noise levels were above the national standards. This was the case even for sensitive zones such as those nearby parks and hospitals. The results obtained through this research demonstrate both, the importance and complexity of the vehicle traffic impact over the noise pollution in the city. [ABSTRACT FROM AUTHOR]

How sustainable is a transport scheme is not easy to define. There are certain aspects in which schemes as the London congestion charge can or can't contribute to the improvement of the quality of life and the rational use of resources. Through 3 criteria: economic, social and environmental, the following paper reviews the characteristics of this transport scheme based on the concept of sustainable mobility to conclude that socially speaking it has been successful while economically it can be improved while its environmental effects are still to be established. [ABSTRACT FROM AUTHOR]

El artículo discurre sobre los aspectos legales y fiscales en cuanto a la construcción de estacionamientos. La autora comenta sobre el Decreto 110/016 reglamentario de la Ley 16/906, que promociona inversiones para solucionar los problemas de tráfico en España. También se consideran los beneficios monetarios asociados con los proyectos de construcción de estacionamientos.