scholarly journals Minimizing the Average Delay at Intersections via Presignals and Speed Control

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Mina Ghanbarikarekani ◽  
Xiaobo Qu ◽  
Michelle Zeibots ◽  
Weiwei Qi
Keyword(s):  
Transportation Systems ◽  
Urban Transport ◽  
Transport Systems ◽  
Average Delay ◽  
Public And Private ◽  
Additional Signal ◽  
Traffic Conditions ◽  
Private Transportation ◽  
Overall Efficiency ◽  
Set Up

Urban intersections have been well recognized as bottlenecks of urban transport systems. It is thus important to propose and implement strategies for increasing the efficiency of public and private transportation systems as a whole. In order to achieve this goal, an additional signal could be set up near the intersection to give priority to buses through stopping vehicles in advance of the main intersection as a presignal. It has been increasingly popular in urban cities. While presignals indeed reduce the average delay per traveler, they cause extra stops of private vehicles, which might compromise the overall efficiency, safety, and sustainability. This paper aims to propose a model to improve presignals by reducing the vehicles’ number of stops behind the presignals. By applying the method, vehicles would be able to adjust their speed based on traffic conditions as well as buses’ speed and approach. Numerical analyses have been conducted to determine the conditions required for implementing this method.

scholarly journals Deep Learning System for Vehicular Re-Routing and Congestion Avoidance

2019 ◽  
Vol 9 (13) ◽  
pp. 2717 ◽  
Author(s):  
Pedro Perez-Murueta ◽  
Alfonso Gómez-Espinosa ◽  
Cesar Cardenas ◽  
Miguel Gonzalez-Mendoza
Keyword(s):  
Deep Learning ◽  
Intelligent Transportation Systems ◽  
Urban Areas ◽  
Transportation Systems ◽  
Learning System ◽  
Traffic Network ◽  
Public And Private ◽  
Traffic Jam ◽  
Private Transportation ◽  
Alternative Routes

Delays in transportation due to congestion generated by public and private transportation are common in many urban areas of the world. To make transportation systems more efficient, intelligent transportation systems (ITS) are currently being developed. One of the objectives of ITS is to detect congested areas and redirect vehicles away from them. However, most existing approaches only react once the traffic jam has occurred and, therefore, the delay has already spread to more areas of the traffic network. We propose a vehicle redirection system to avoid congestion that uses a model based on deep learning to predict the future state of the traffic network. The model uses the information obtained from the previous step to determine the zones with possible congestion, and redirects the vehicles that are about to cross them. Alternative routes are generated using the entropy-balanced k Shortest Path algorithm (EBkSP). The proposal uses information obtained in real time by a set of probe cars to detect non-recurrent congestion. The results obtained from simulations in various scenarios have shown that the proposal is capable of reducing the average travel time (ATT) by up to 19%, benefiting a maximum of 38% of the vehicles.

Distributed Data Management of Daily Car Pooling Problems

2011 ◽  
pp. 408-412
Author(s):  
Roberto Wolfler Calvo ◽  
Fabio de Luigi ◽  
Palle Haastrup ◽  
Vittorio Maniezzo
Keyword(s):  
Public Transportation ◽  
Urban Areas ◽  
Transportation Systems ◽  
Transfer Velocity ◽  
Public And Private ◽  
Transportation Demand ◽  
Freight Transportation Demand ◽  
Set Up ◽  
Public Transportation Systems

The increased human mobility, combined with high use of private cars, increases the load on the environment and raises issues about the quality of life. The use of private cars lends to high levels of air pollution in cities, parking problems, noise pollution, congestion, and the resulting low transfer velocity (and, thus, inefficiency in the use of public resources). Public transportation service is often incapable of effectively servicing non-urban areas, where cost-effective transportation systems cannot be set up. Based on investigations during the last years, problems related to traffic have been among those most commonly mentioned as distressing, while public transportation systems inherently are incapable of facing the different transportation needs arising in modern societies. A solution to the problem of the increased passenger and freight transportation demand could be obtained by increasing both the efficiency and the quality of public transportation systems, and by the development of systems that could provide alternative solutions in terms of flexibility and costs between the public and private ones. This is the rationale behind so-called Innovative Transport Systems (ITS) (Colorni et al., 1999), like car pooling, car sharing, dial-a-ride, park-and-ride, card car, park pricing, and road pricing, which are characterized by the exploitation of innovative organizational elements and by a large flexibility in their management (e.g., traffic restrictions and fares can vary according with the time of day).

scholarly journals Analysis of Aerial Ropeways by following various Indian and International Codes for Urban Mobility with some Structural Modifications in Monocable Ropeways to make it Safe, Secure, Economical and all Weather Durable

2021 ◽  
Vol 9 (VI) ◽  
pp. 1539-1548
Author(s):  
Bhat Omair Bashir
Keyword(s):  
Public Transportation ◽  
Urban Areas ◽  
Public Transit ◽  
Transportation Systems ◽  
Urban Transport ◽  
Transport Systems ◽  
Transit Systems ◽  
Tourist Attractions ◽  
Structural Modifications ◽  
Transit Service

Cable-propelled transit’ (CPT), in particular detachable aerial ropeways are widely employed as transportation systems in alpine areas. In recent years, these transport systems have also been increasingly used in urban areas and are no longer a niche public transportation technology (Hoffmann 2006, Alshalalfah, Shalaby, and Dale 2014). Cable cars systems compete with performance characteristics of other more common urban transport technologies and have the potential to enhance the existing transport provision in cities (O'Connor and Dale 2011). While many applications can be found as transportation systems in airport facilities, and to provide access to tourist attractions, several metropolitan areas have even incorporated gondolas and aerial tramways into their public transport networks. This paper focuses on aerial ropeway systems that operate as a mass transit service (similar to buses, BRT, LRT, etc.) and are part of the public transit systems in their respective cities. Therefore, the analysis and case studies presented in the paper concern systems that are used as a public transit service

scholarly journals PERCEPÇÃO DE CIDADÃOS DE UMA CIDADE DE MÉDIO PORTE EM RELAÇÃO AO USO DA BICICLETA COMO MODO DE TRANSPORTE

2017 ◽  
Vol 13 (1) ◽  
Author(s):  
Mariana Grade Ricieri ◽  
Heliana Barbosa Fontenele ◽  
Carlos Alberto Prado Da Silva Junior
Keyword(s):  
Urban Transport ◽  
Transport Systems ◽  
Urban Mobility ◽  
Public And Private ◽  
Urban Travel ◽  
Logistics Systems ◽  
Private Investments ◽  
Mode Of Transportation ◽  
Socioeconomic Profile ◽  
Sustainable Urban Mobility

RESUMO: As cidades de porte médio no Brasil têm ocupado posição de destaque nos últimos anos. Porém, estas cidades têm seguido o mesmo caminho das cidades brasileiras mais populosas e negligenciado aspectos que garantam à manutenção das condições que favorecem investimentos públicos e principalmente privados. Em relação aos sistemas de transporte e logística, cada vez mais as cidades de porte médio têm se tornado dependente do uso do automóvel e evitado políticas de incentivo à mobilidade urbana sustentável. Desta forma, entender a percepção dos usuários dos sistemas de transporte urbano é fundamental para traçar medidas de incentivo para modos alternativos de viagens urbanas. O objetivo deste estudo é apresentar uma análise da percepção dos usuários quanto aos modos de deslocamento urbano, principalmente a bicicleta e medidas específicas de incentivo ao uso deste modo não motorizado. A pesquisa foi realizada por meio de entrevistas com um questionário impresso. As respostas possibilitaram obter a opinião sobre o uso da bicicleta como modo de transporte, caracterizar o perfil socioeconômico dos entrevistados e simular um cenário em relação ao uso da bicicleta. Para o caso específico deste estudo ficou evidente que os entrevistados são favoráveis ao uso da bicicleta e uma parcela está disposta a usar o ciclismo desde que sejam implantadas medidas de incentivo.
 
 ABSTRACT: The medium-sized cities in Brazil have occupied a prominent position in the last years. However, these cities have followed the same path of the most populous Brazilian cities and have neglected aspects that guarantee the maintenance of the conditions that favor public and private investments. Regarding transport and logistics systems, more and more medium-sized cities have become dependent on the use of the car and have avoided policies to encourage sustainable urban mobility. In this way, understanding the users' perception of urban transport systems is fundamental to outline incentive measures for alternative modes of urban travel. The objective of this study is to present an analysis of the perception of the users regarding urban displacement modes, especially the bicycle and specific measures to encourage the use of this non-motorized mode. The research was conducted through interviews with a printed questionnaire. The answers made it possible to obtain the opinion about the use of the bicycle as a mode of transportation, characterize the socioeconomic profile of the interviewees and simulate a scenario regarding the use of the bicycle. For the specific case of this study it was evident that the interviewees are favorable to the use of the bicycle and a portion is willing to use the bicycle provided that incentive measures are implemented.

scholarly journals Methodology of Selecting Optimal Fare System for Public Transport of Passengers

2018 ◽  
Vol 30 (5) ◽  
pp. 539-547
Author(s):  
Vladimir Dragan Popović ◽  
Pavle Gladović ◽  
Milica Miličić ◽  
Milan Stanković
Keyword(s):  
Public Transport ◽  
Road Transport ◽  
Transportation Systems ◽  
Urban Transport ◽  
Transport Systems ◽  
Transport Sector ◽  
Fair Competition ◽  
Basic Source ◽  
Novi Sad ◽  
Tariff System

According to the European Committee (EC) on Transport, the future road transport strategy lies in creating a strong road transport sector which is based on a well-functioning internal market, fair competition and workers’ rights, decarbonization, and use of digital technologies. Urban and suburban passenger transportation systems, according to the principles of the EC, have a key role in achieving the goal of sustainable development and sustainable transport in cities. The fare, ticketing, and payment modes have a significant impact on public urban transport systems, primarily in terms of collecting transport service fees, and represent the basic source of financing of such systems, in addition to subsidies and grants from city budgets. This paper presents the selection methodology of the optimal fare system for urban public transport, applicable for all cities with an organized public city passenger transport (PCPT) system. Based on the established criteria with respect to setting tariff limits and fare systems, passenger demand, and the enterprise organizing the transport, the tariff system was selected. The presented method is that of multi- criteria optimization of the tariff system with numerical results on the example of the City of Novi Sad.

scholarly journals The Multi-Station Based Variable Speed Limit Model for Realization on Urban Highway

Electronics ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 801 ◽  
Author(s):  
Soobin Jeon ◽  
Chongmyung Park ◽  
Dongmahn Seo
Keyword(s):  
Real Time ◽  
Transportation Systems ◽  
Traffic Information ◽  
Transport Systems ◽  
Speed Limit ◽  
Stability Assessment ◽  
Variable Speed ◽  
Variable Speed Limit ◽  
Traffic Conditions ◽  
Real Time Traffic

Intelligent transport systems (ITS) are a convergence of information technology and transportation systems as seen in the variable speed limit (VSL) system. Since the VSL system controls the speed limit according to the traffic conditions, it can improve the safety and efficiency of a transport network. Many researchers have studied the real-time VSL (RVSL) algorithm based on real-time traffic information from multiple stations recording traffic data. However, this method can suffer from inaccurate selection of the VSL start station (VSS), incorrect VSL calculations, and is unable to quickly react to the changing traffic conditions. Unstable VSL systems result in more congestion on freeways. In this study, an enhanced VSL algorithm (EVSL) is proposed to address the limitations of the existing RVSL algorithm. This selects preliminary VSL start stations (pVSS), which is expected to end congestion using acceleration and allocates final VSSs for each congestion interval using selected pVSS. This controls the vehicles that entered the congestion area based on the selected VSS. We used four metrics to evaluate the performance of the proposed VSL (VSS stability assessment, speed control stability assessment, travel time, and shockwave), which were all enhanced when compared to the standard RVSL algorithm. In addition, the EVSL algorithm showed stable VSL performance, which is critical for road safety.

A Comprehensive Study on Intelligent Transportation Systems

2018 ◽  
Vol 4 (10) ◽  
pp. 10
Author(s):  
Ankur Mishra ◽  
Aayushi Priya
Keyword(s):  
Intelligent Transportation Systems ◽  
Traffic Congestion ◽  
Transportation Systems ◽  
Environmental Conservation ◽  
Integrated System ◽  
Transport Systems ◽  
Transport Sector ◽  
Intelligent Transport System ◽  
Intelligent Transport ◽  
Transportation Sector

Transportation or transport sector is a legal source to take or carry things from one place to another. With the passage of time, transportation faces many issues like high accidents rate, traffic congestion, traffic & carbon emissions air pollution, etc. In some cases, transportation sector faced alleviating the brutality of crash related injuries in accident. Due to such complexity, researchers integrate virtual technologies with transportation which known as Intelligent Transport System. Intelligent Transport Systems (ITS) provide transport solutions by utilizing state-of-the-art information and telecommunications technologies. It is an integrated system of people, roads and vehicles, designed to significantly contribute to improve road safety, efficiency and comfort, as well as environmental conservation through realization of smoother traffic by relieving traffic congestion. This paper aims to elucidate various aspects of ITS - it's need, the various user applications, technologies utilized and concludes by emphasizing the case study of IBM ITS.

Urban Transport

2018 ◽  
Author(s):  
José van
Keyword(s):  
Urban Areas ◽  
Urban Transport ◽  
Transport Sector ◽  
Public And Private ◽  
Transport Services ◽  
Ride Sharing ◽  
The World ◽  
Private And Public ◽  
Selection Mechanisms

Platformization affects the entire urban transport sector, effectively blurring the division between private and public transport modalities; existing public–private arrangements have started to shift as a result. This chapter analyzes and discusses the emergence of a platform ecology for urban transport, focusing on two central public values: the quality of urban transport and the organization of labor and workers’ rights. Using the prism of platform mechanisms, it analyzes how the sector of urban transport is changing societal organization in various urban areas across the world. Datafication has allowed numerous new actors to offer their bike-, car-, or ride-sharing services online; selection mechanisms help match old and new complementors with passengers. Similarly, new connective platforms are emerging, most prominently transport network companies such as Uber and Lyft that offer public and private transport options, as well as new platforms offering integrated transport services, often referred to as “mobility as a service.”

scholarly journals Smart Cities in Turkey: Approaches, Advances and Applications with Greater Consideration for Future Urban Transport Development

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2308 ◽  
Author(s):  
Can Bıyık
Keyword(s):  
Urban Areas ◽  
Planning Process ◽  
Smart Cities ◽  
Radical Change ◽  
Urban Transport ◽  
Transport Systems ◽  
Structured Interviews ◽  
Policy Makers ◽  
Comprehensive Survey ◽  
Future Vision

The smart city transport concept is viewed as a future vision aiming to undertake investigations on the urban planning process and to construct policy-pathways for achieving future targets. Therefore, this paper sets out three visions for the year 2035 which bring about a radical change in the level of green transport systems (often called walking, cycling, and public transport) in Turkish urban areas. A participatory visioning technique was structured according to a three-stage technique: (i) Extensive online comprehensive survey, in which potential transport measures were researched for their relevance in promoting smart transport systems in future Turkish urban areas; (ii) semi-structured interviews, where transport strategy suggestions were developed in the context of the possible imaginary urban areas and their associated contextual description of the imaginary urban areas for each vision; (iii) participatory workshops, where an innovative method was developed to explore various creative future choices and alternatives. Overall, this paper indicates that the content of the future smart transport visions was reasonable, but such visions need a considerable degree of consensus and radical approaches for tackling them. The findings offer invaluable insights to researchers inquiring about the smart transport field, and policy-makers considering applying those into practice in their local urban areas.

Technology Politics, An Analytical Unit

1982 ◽  
Vol 32 ◽  
pp. 17-17
Author(s):  
Stephen R. Lefevre
Keyword(s):  
Building Materials ◽  
Space Shuttle ◽  
Renewable Energy Sources ◽  
Transportation Systems ◽  
Synthetic Fuels ◽  
Public And Private ◽  
Policy System ◽  
Home Building ◽  
Automobile Engines ◽  
Civilian Defense

Political scientists are increasingly interested in understanding policymaking in civilian, defense and space technologies. The answer to the question why this is, is found partly in the emergence of the policy field itself, and partly in the enormously expanded role that government stimulus of technological innovation is playing in the public and private sectors. A listing of some recent programs — breeder and fusion reactor R&D, the space shuttle, windmill farm demonstration programs, synthetic fuels programs, and dial-a-ride transportation systems — gives some indication of the scope of federal involvement, and points up some of the implications that this enlarged role has for the student of public policy. Why, for instance, has government elected to stimulate innovations in certain technologies and not others? Who are the key actors shaping the policymaking process in R&D? Are their gaps in federal efforts? Is the policy system responding effectively to needs for renewable energy sources, alternative home building materials, gasoline-efficient automobile engines, etc?

Sign in / Sign up

Export Citation Format

Share Document