Dissertations / Theses on the topic 'Traffic congestion'
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Bojs, Eric. "Quantifying Traffic Congestion in Nairobi." Thesis, KTH, Matematisk statistik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-275684.
Full textMålet med rapporten är att ge insikt i en innovativ ansats för att kvantifiera biltrafik i utvecklingsstäder. Detta kommer som en nödvändighet för att kunna förbättra resursfördelning i utvecklandet av infrastruktur. Projektet utspelade sig som en fallstudie där stadsdelar i Nairobi, Kenya studerades. Ansatsen innefattar en metod som bygger på tekniker från topologisk dataanalys (eng. \textit{Topological Data Analysis}), tillsammans med stora datakällor från taxitjänster i staden. Detta hoppas ge både kvalitativ och kvantitativ information om trafiken i staden. Metoden visade sig vara användbar för att förstå hur trafik sprider sig och att differentiera mellan nivåer av trafik, alltså att kvantifiera den. Tyvärr så misslyckades metoden visa sig användbar för att mäta förbättringar i infrastruktur.
Lerz, Stefan. "Congestion theory and railway traffic /." Capelle a/d IJssel : Labyrint, 1996. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=007375963&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Full textWong, Wan-ho. "Bus to bus interchange : solution for traffic congestion in Hong Kong Island /." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk:8888/cgi-bin/hkuto%5Ftoc%5Fpdf?B23425787.
Full textRamakrishna, Sajja D. "An approach to predict traffic congestion." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09192009-040304/.
Full textWelzl, Michael. "Network congestion control : managing Internet traffic /." Chichester [u.a.] : Wiley, 2005. http://www.loc.gov/catdir/toc/ecip0513/2005015429.html.
Full textLee, Tak-kwong. "A study of the traffic congestion problem in Hong Kong : a case study of Wanchai district /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19906511.
Full textHuisken, Giovanni. "Inter-urban short-term traffic congestion prediction." Enschede : University of Twente [Host], 2006. http://doc.utwente.nl/57639.
Full textDrum, David K. "Counteracting traffic congestion using intelligent driver feedback." Thesis, University of Missouri - Columbia, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10180875.
Full textTraffic congestion is a daily occurrence in urban highway networks worldwide. It is not possible, however, for society to build its way out of congestion; rather, smarter roads and vehicles are needed. While the development of a smarter transportation system is underway, full implementation is years or decades from now. Yet, some of the sensing technology needed for smarter vehicles is already widely deployed in the form of smart phones. This thesis develops a novel method for recognizing traffic congestion using an artificially intelligent heuristic that could be implemented in a smart phone application or embedded system. Its goal is to provide intelligent feedback to a driver or autonomous vehicle control system to counteract stop-and-go traffic, a defining feature of urban highway congestion. Evaluation of the method indicates that a specific condition during stop-and-go traffic can be recognized accurately. A driver or control system acting upon feedback provided by the artificially intelligent system can improve traffic flow on the roadway by 1% to 3.5% over the course of the test duration.
Arya, Vijay. "Congestion inference and traffic engineering in networks." Nice, 2005. http://www.theses.fr/2005NICE4079.
Full textThis thesis presents methods which help to improve the quality of congestion inference on both en-to-end paths and internal network links in the Internet and a method which help to perform multicast traffic engineering in Overlay Networks. First, we propose an explicit loss differentiation scheme which allows unreliable transport protocols to accurately infer congestion on end-to-end paths by correctly differentiating congestion losses from wireless losses. Second, we present two contributions related to Multicast-based Inference of Network Characteristics (MINC). MINC is a method of performing network tomography which infers loss rates, i. E. , congestion on internal network links from end-to-end multicast measurements. We propose a statistical verification algorithm which can verify the integrity of binary multicast measurements used by MINC to perform loss inference. This algorithm helps to ensure a trustworthy inference of link loss rates. Next, we propose an extended MINC loss estimator which can infer loss rates of network links using aggregate multicast feedbacks. This estimator can be used to perform loss inference in situations where the bandwidth to report multicast feedbacks is low. Third, we present efficient ways of encoding multicast trees within data packets. These encodings can be used to perform stateless and explicit multicast routing in overlay networks and thus achieve goals of multicast traffic engineering
Raman, Mala. "Supply management measures for alleviating urban traffic congestion." Master's thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-03302010-020519/.
Full textWan, Kam Hung. "Transit services planning with congestion /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202006%20WAN.
Full textCherrett, Thomas James. "Congestion and driver response." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244976.
Full textKam, Yee-sheung Karen. "A study of the Hong Kong government's transport policy : the formulation of a comprehensive, multi-pronged approach to solving traffic congestion in Hong Kong /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17507546.
Full textKuchi, Mahathi B. "Assessing the relationship between recurring and nonrecurring traffic congestion." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06102009-063124/.
Full textAcha-Daza, Jorge. "The user's response to pricing in a traffic network /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
Full textBruce, Edward L. "An enhanced methodology for quantifying Urban freeway congestion and its uses within the congestion management system." Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/21259.
Full textLee, Yan-pui, and 李昕鋇. "A new approach to presenting congestion level alerts to road users." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B46541421.
Full textCheevarunothai, Patikhom. "Development of methods for improving inductance loop data quality and quantifying incident-induced delay on freeways /." Thesis, Connect to this title online; UW restricted, 2008. http://hdl.handle.net/1773/10204.
Full textBiswas, Md Israfil. "Internet congestion control for variable-rate TCP traffic." Thesis, University of Aberdeen, 2011. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=182264.
Full textKelley, Simon Richard. "Congestion control for unreserved traffic in ATM networks." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319763.
Full textBigazzi, Alexander York. "Traffic Congestion Mitigation as an Emissions Reduction Strategy." PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/131.
Full textYang, Yang. "Network congestion control." Access restricted to users with UT Austin EID, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3037028.
Full textRaheja, Tushar. "Modelling traffic congestion - to wait or to be late." Thesis, IIT Delhi, 2016. http://localhost:8080/iit/handle/2074/7009.
Full textSurabhi, Suman Reddy. "Traffic responsive signal systems to address rain-related congestion." Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2008m/surabhi.pdf.
Full textBui, Kim Thien. "Dynamic traffic congestion pricing mechanism with user-centric considerations." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/85817.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 85-95).
In this thesis, we consider the problem of designing real-time traffic routing systems in urban areas. Optimal dynamic routing for multiple passengers is known to be computationally hard due to its combinatorial nature. To overcome this difficulty, we propose a novel mechanism called User-Centric Dynamic Pricing (UCDP) based on recent advances in algorithmic mechanism design. The mechanism allows for congestion-free traffic in general road networks with heterogeneous users, while satisfying each user's travel preference. The mechanism first informs whether a passenger should use public transportation or the road network. In the latter case, a passenger reports his maximum accepted travel time with a lower bound announced publicly by the road authority. The mechanism then assigns the passenger a path that matches with his preference given the current traffic condition in the network. The proposed mechanism introduces a fairness constrained shortest path (FCSP) problem with a special structure, thus enabling polynomial time computation of path allocation that maximizes the sequential social surplus and guarantees fairness among passengers. The tolls of paths are then computed according to marginal cost payments. We show that reporting true preference is a weakly dominant strategy. The performance of the proposed mechanism is demonstrated on several simulated routing experiments in comparison to user equilibrium and system optimum.
by Kim Thien Bui.
S.M. in Transportation
Soelistijanto, Bambang. "Traffic distribution fairness and congestion in social opportunistic networks." Thesis, University of Surrey, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616477.
Full textHuang, Changcheng Carleton University Dissertation Engineering Systems and Computer. "Long range dependent traffic: modeling, simulation and congestion control." Ottawa, 1996.
Find full textRivera, Saavedra Gabriel, and Ochochoque Luis Alberto Velásquez. "Propuesta de implementación de un sistema de semaforización inteligente para mejorar los niveles de servicio de la Av. Javier Prado Oeste, tramo Ca. Las Palmeras y Ca. Las Flores en el distrito de San Isidro." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/651707.
Full textThe present investigation analyzes the current vehicular traffic conditions at two intersections of Javier Prado Oeste Avenue, Las Flores Street and Las Palmeras Street, in the San Isidro district. The investigation begins with the description of the problems existing at the intersections, such as poor traffic light programming, lack of coordinated traffic lights and incompatibility between traffic light controllers. The research analysis was carried out based on a microscopic model, developed with the support of Vissim software. The construction process of both models consists of four phases. The first phase is the previous work, in which the field data collection was carried out. Second, there is the construction of the models through the program. Third, the calibration and validation of both models was performed based on GEH psychophysical and statistical parameters to certify that the results of the model resemble the current conditions of the intersections. Finally, the new future flows were incorporated into the models every 15 minutes, which were simulated, evaluated and compared with the service levels obtained with the projected intersections that incorporate the improvement proposal. Essentially, the service levels of the intersections improve by incorporating the smart traffic lights proposal through the optimization of traffic light cycles with the Synchro 10.0 program, this is deduced from the decrease in queue lengths in all accesses and the reduction of delays of travel at both intersections.
Tesis
Suthiranart, Yaourai. "The transportation crisis in Bangkok : an exploratory evaluation /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/10827.
Full textNg, Ka-wing Simon. "Cross border freight traffic congestion : the Hong Kong-Shenzhen case /." [Hong Kong] : University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13730897.
Full textSivanandan, R. "A linear programming approach for synthesizing origin-destination (O-D) trip tables from link traffic volumes." Diss., This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-07102007-142518/.
Full textMohamed, Samatha Ann. "The feasibility of a congestion charge for Cape Town central business district from a traffic engineering perspective /." [S.l. : s.n.], 2008. http://dk.cput.ac.za/cgi/viewcontent.cgi?article=1068&context=td_cput.
Full textLai, Chengdi, and 賴成迪. "Systematic design of internet congestion control : theory and algorithms." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206356.
Full textpublished_or_final_version
Electrical and Electronic Engineering
Doctoral
Doctor of Philosophy
Nam, Doohee. "Econometric analysis of highway incident duration, public perceptions and information for advanced traveler information systems /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/10172.
Full textLindberg, Per Olov. "Aspects of Static Multi-Class Traffic equilibria under Congestion Pricing." Licentiate thesis, KTH, Transport and Location Analysis, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12963.
Full textCongestion charging is a now accepted means of influencing traffic to behave in a more socio-economic optimal way, like e.g. in the Stockholm project. Already early work, in the 1920’s, showed that road use can be inefficient due externalities, i.e. that users don’t experience their own (negative) effect on other users: an extra car on a traffic link causes delays for other cars, but the driver himself does not experience this cost.In the 1950’s it was further shown - for a congested road network with homogeneous users – that if each user is charged a toll equal to the total value of time loss incurred on other users of the network, then -if we have fixed travel demand - this will induce an equilibrium that is system optimal in the sense that the total cost of network usage is minimal (assuming that all users have fixed and identical time values). But toll charges need to be levied in monetary units, and different travelers have different values of time. Therefore, to account for the effects of tolls, and to be able to compute equilibria, one needs to introduce different user classes, differing in their time values.
In this thesis, consisting of four papers, we study congestion pricing of road networks with users differing only in their time values. In particular, we analyze marginal social cost (MSC) pricing, a tolling scheme that charges each user a penalty corresponding to the value of the delays inflicted on other users, as well as its implementation through fixed tolls.
Paper III contains the main theoretical work of the thesis. In that paper we show that the variational inequalities characterizing the equilibria in question can be stated in symmetric or non-symmetric forms. The symmetric forms correspond to optimization problems, convex in the fixed-toll case and non-convex in the MSC case, which hence may have multiple equilibria. The objective of the latter problem is the total value of travel time, which thus is minimized at the global optima of that problem. Implementing close-to-optimal MSC tolls as fixed tolls leads to equilibria with possibly non-unique class specific flows, but with identical close-to-optimal values of the total value of travel time. Finally we give an adaptation, to the MSC setting, of the Frank-Wolfe algorithm, which is further applied to some test cases, including Stockholm.
Paper I is an early application using Frank-Wolfe, after having realized the possibility to symmetrize the problem.
Paper II gives a convexification of non-convex equilibrium problem for MSC tolls. We have used these convexifications to compute lower bounds when computing equilibria.
Paper IV is a short note commenting some flaws in two papers by Dial on MSC tolls.
Ng, Ka-wing Simon, and 吳家穎. "Cross border freight traffic congestion: the Hong Kong-Shenzhen case." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B3121180X.
Full textLim, Sejoon. "Congestion-aware traffic routing for large-scale mobile agent systems." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78452.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 191-201).
Traffic congestion is a serious world-wide problem. Drivers have little knowledge of historical and real-time traffic congestion for the paths they take and often tend to drive suboptimal routes. Congestion phenomena are sure to be influenced by the coming of autonomous cars. This thesis presents route planning algorithms and a system for either autonomous or human-driven cars in road networks dealing with travel time uncertainty and congestion. First, a stochastic route planning algorithm is presented that finds the best path for a group of multiple agents. Our algorithm provides mobile agents with optimized routes to achieve time-critical goals. Optimal selections of agent and visit locations are determined to guarantee the highest probability of task achievement while dealing with uncertainty of travel time. Furthermore, we present an efficient approximation algorithm for stochastic route planning based on pre-computed data for stochastic networks. Second, we develop a distributed congestion-aware multi-agent path planning algorithm that achieves the social optimum, minimizing aggregate travel time of all the agents in the system. As the number of agents grows, congestion created by agents' path choices should be considered. Using a data-driven congestion model that describes the travel time as a function of the number of agents on a road segment, we develop a practical method for determining the optimal paths for all the agents in the system to achieve the social optimum. Our algorithm uses localized information and computes the paths in a distributed manner. We implement the algorithm in multi-core computers and demonstrate that the algorithm has a good scalability. Third, a path planning system using traffic sensor data is then implemented. We predict the traffic speed and flow for each location from a large set of sensor data collected from roving taxis and inductive loop detectors. Our system uses a data-driven traffic model that captures important traffic patterns and conditions using the two sources of data. We evaluate the system using a rich set of GPS traces from 16,000 taxis in Singapore and show that the city-scale congestion can be mitigated by planning drivers' routes, while incorporating the congestion effects generated by their route choices.
by Sejoon Lim.
Ph.D.
Piironen, S. Annukka. "Multimedia traffic management and congestion control in satellite ATM networks." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/36460.
Full textIncludes bibliographical references (leaves 101-102).
by S. Annukka Piironen.
M.S.
Bakare, Bukola. "Corporate Social Responsibility and Traffic Congestion: A Mixed Methods Study." Diss., North Dakota State University, 2020. https://hdl.handle.net/10365/31782.
Full textThorri, Sigurdsson Thorsteinn. "Road traffic congestion detection and tracking with Spark Streaming analytics." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254874.
Full textVägtrafikstockningar orsakar flera problem. Till exempel utgör långsam trafik i överbelastade områden en säkerhetsrisk för fordon som närmar sig den överbelastade regionen och ökade pendeltider leder till ökade transportkostnader och ökad förorening.Arbetet i denna avhandling syftar till att upptäcka och spåra trafikstockningar i realtid. Detektering av vägtrafiken i realtid är viktigt för att möjliggöra mekanismer för att t.ex. förbättra trafiksäkerheten genom att skicka avancerade varningar till förare som närmar sig en överbelastad region och för att mildra trängsel genom att kontrollera adaptiva hastighetsgränser. Dessutom kan spårningen av trängselutveckling i tid och rum vara en värdefull inverkan på utvecklingen av vägnätet. Trafikavkännare i Stockholms vägnät representeras som en riktad vägd graf och problemet med överbelastningsdetektering är formulerat som ett problem med behandling av flödesgrafer. Den anslutna komponentalgoritmen och befintliga grafbehandlingsalgoritmer som ursprungligen användes för communitydetektering i sociala nätgravar är anpassade för uppgiften att detektera vägtäthet. Resultaten indikerar att en överbelastningsdetekteringsmetod baserad på den strömmande anslutna komponentalgoritmen och den inkrementella Dengraph communitydetekteringsalgoritmen kan upptäcka överbelastning med noggrannhet i bästa fall upp till 94% för anslutna komponenter och upp till 88% för Dengraph. En metod baserad på hierarkisk klustring kan detektera överbelastning men saknar detaljer som shockwaves, och Louvain modularitetsalgoritmen för communitydetektering misslyckas med att detektera överbelastade områden i trafiksensorns graf.Slutligen utvärderas prestandan hos de implementerade strömmalgoritmerna med hänsyn till systemets realtidskrav, deras genomströmning och minnesfotavtryck.
Chin, Kian Keong. "Departure time choice in equilibrium traffic assignment." Thesis, University of Leeds, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364638.
Full textSanhaji, Ali. "Nouveaux paradigmes de contrôle de congestion dans un réseau d'opérateur." Phd thesis, Toulouse, INPT, 2016. http://oatao.univ-toulouse.fr/17304/1/sanhaji.pdf.
Full textPaksarsawan, Sompong. "The development of queuing simulation procedures for traffic in Bangkok." Thesis, University of Leeds, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364645.
Full textGanguly, Bulbul. "Evaluation of media tie-in with Gateway Guide ITS deployment in St. Louis, Missouri /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1426057.
Full textKwok, Shi-chung Colin. "The role of electronic road pricing in tackling traffic congestion in Hong Kong." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21128832.
Full textSilveira, Filho Fernando Jorge. "Unsupervised diagnosis of network traffic anomalies." Paris 6, 2010. http://www.theses.fr/2010PA066243.
Full textLi, Man-hon. "Evaluation of traffic congestion relieving options with using cost-benefit analysis : case study of Central-Wan Chai /." View the Table of Contents & Abstract, 2005. http://sunzi.lib.hku.hk/hkuto/record/B35080747.
Full textRivera, Saavedra Gabriel, and Ochochoque Luis Alberto Velásquez. "Determinación de ciclos semafóricos optimizados con Synchro 10.0 aplicados y evaluados en intersecciones de gran congestión vehicular con el software PTV Vissim 9.0." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/626118.
Full textThis paper presents the evaluation of vehicular traffic on two signalized intersections located in the city of Lima; one of the world's major cities with high traffic congestion; by microscopic model developed with Vissim 9.0 software. The purpose of this research is to propose the implementation of an intelligent traffic signals to improve service levels and reduce traffic congestion. The process of building the model consists of four stages. First, it is the previous work, in which the field data collection was performed. The model was then constructed by Vissim 9.0 software. After, calibration and validation of the model was performed on both intersections based on psychophysical parameters to certify that the model results resemble the actual conditions of intersections. Finally, new future flows were incorporated into the model every 15 minutes which were simulated and evaluated with the NS obtained, incorporating the proposed improvement. Essentially service levels intersections improve, determining every 15 minutes during rush hour new signalized cycles optimized with Synchro 10.0 program applied to Vissim 9.0, from an NS E to D, It follows from decreasing lengths queues at all entrances and reducing travel delays, which were 14% at Av. Javier Prado -. Ca. Las Flores and 24% on Av. Javier Prado -. Ca. Las Palmeras.
Tesis
Bai, Lihui. "Computational methods for toll pricing models." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0006341.
Full textPoon, Ming-ho. "A dynamic schedule-based model for congested transit networks /." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk/hkuto/record.jsp?B24729784.
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