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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
191

Impacto de medidas para estímulo ao uso da bicicleta em viagens ao trabalho : estudo de caso envolvendo funcionários da Companhia Riograndese de Saneamento

Peña Rodrigues, Fernando Schultz January 2017 (has links)
Diversos problemas de transporte, observados nas grandes metrópoles, têm sido mitigados com o aumento da capacidade da infraestrutura viária, voltada à circulação de veículos motorizados individuais. Com isso observa-se, atualmente, aumento dos congestionamentos, das poluições sonora e ambiental, mudanças climáticas e redução nos índices de atividade física da população. Uma alternativa encontrada por muitas cidades é a transformação de seu sistema viário em um local atrativo para utilização dos Modos Ativos de Transporte – realização de viagens a pé ou de bicicleta. Nesse sentido, a cidade de Porto Alegre desde 2010 vem aumentando a quantidade de ciclovias e ciclofaixas disponíveis. No entanto, a literatura indica que existem diversos outros fatores que influenciam na decisão por usar a bicicleta como modo de transporte, principalmente para os deslocamentos até o trabalho. Dessa forma, essa dissertação teve como objetivo avaliar o impacto que a implantação de vestiário, bicicletário, empréstimo de bicicletas, treinamento para trafegar de bicicleta e ciclovias disponíveis nas principais vias de Porto Alegre, causariam na probabilidade dos funcionários da Companhia Riograndense de Saneamento (CORSAN) utilizarem a bicicleta para realizar pelo menos dois deslocamentos por semana entre a sua casa e o trabalho. Para isso foi realizada uma Pesquisa de Preferência Declarada, incluindo essas variáveis e características socioeconômicas dos funcionários. A análise das medidas foi realizada utilizando o Modelo Logit Ordenado. Foi observado que o impacto da implantação das melhorias propostas possui magnitude maior que as características socioeconômicas das pessoas. Pessoas que atualmente utilizam o automóvel particular para seus deslocamentos diários são menos propensos à inclusão da bicicleta nos seus deslocamentos, assim como as que possuem filhos. A disponibilidade de vestiário com chuveiro e armário mostrou-se a variável mais importante para o estímulo do uso da bicicleta. A presença de um bicicletário interno e seguro, disponibilidade de bicicletas para empréstimo no local de trabalho e a presença de ciclovias no trajeto também apresentaram impactos significativos. O impacto da disponibilidade de treinamento para o uso de bicicleta foi significativamente menor que os observados nas outras variáveis. Considerando a viabilidade econômica e os benefícios observados, recomenda-se a implantação de vestiário e bicicletário, como medida de estímulo ao uso da bicicleta para os deslocamentos até o trabalho. / Most metropolitan areas mitigate transportation problems by increasing road infrastructure for motorized vehicles. This practice results in an increase in traffic congestion, noise and environmental pollution and reduction in the population’s physical activity levels. Many cities have tackled these externalities by transforming their road system into an attractive environment for Active Transport Modes - walking or cycling. As an example, the city of Porto Alegre has invested in the expansion of its cycling network since 2010. According to the literature, cycling infrastructure is one of the main factors that influence the use of bicycle for transportation, especially to work. The purpose of this thesis was to evaluate the impact of implementing different measures to improve the use of bicycle for commutes using as case study Companhia Riograndense de Saneamento (CORSAN). The evaluated measures included availability of changing rooms, cycle parking, bike sharing systems, training on bicycle use, and cycle paths. An Ordered Logit Model was estimated based onStated Preference data. The impact of the proposed measures has greater magnitude than employee’s socioeconomic characteristics. Individuals who currently use the private car for commute are less likely to use bicycles for those trips, as well as those with children. The availability of a changing room with shower and locker proved to be the most important variable to increase bicycle use among CORSAN employees. Cycle parking inside the building in a safe place, a bike sharing system and the presence of cycle paths along the way also had significant impacts. The impact of training availability for bicycle use was significantly lower, compared to other variables. This research also suggests that implementation of changing room and appropriate parking facilities for bicycles are affordable and important measures to promote the use of bicycle for commutes to work.
192

Impacto de medidas para estímulo ao uso da bicicleta em viagens ao trabalho : estudo de caso envolvendo funcionários da Companhia Riograndese de Saneamento

Peña Rodrigues, Fernando Schultz January 2017 (has links)
Diversos problemas de transporte, observados nas grandes metrópoles, têm sido mitigados com o aumento da capacidade da infraestrutura viária, voltada à circulação de veículos motorizados individuais. Com isso observa-se, atualmente, aumento dos congestionamentos, das poluições sonora e ambiental, mudanças climáticas e redução nos índices de atividade física da população. Uma alternativa encontrada por muitas cidades é a transformação de seu sistema viário em um local atrativo para utilização dos Modos Ativos de Transporte – realização de viagens a pé ou de bicicleta. Nesse sentido, a cidade de Porto Alegre desde 2010 vem aumentando a quantidade de ciclovias e ciclofaixas disponíveis. No entanto, a literatura indica que existem diversos outros fatores que influenciam na decisão por usar a bicicleta como modo de transporte, principalmente para os deslocamentos até o trabalho. Dessa forma, essa dissertação teve como objetivo avaliar o impacto que a implantação de vestiário, bicicletário, empréstimo de bicicletas, treinamento para trafegar de bicicleta e ciclovias disponíveis nas principais vias de Porto Alegre, causariam na probabilidade dos funcionários da Companhia Riograndense de Saneamento (CORSAN) utilizarem a bicicleta para realizar pelo menos dois deslocamentos por semana entre a sua casa e o trabalho. Para isso foi realizada uma Pesquisa de Preferência Declarada, incluindo essas variáveis e características socioeconômicas dos funcionários. A análise das medidas foi realizada utilizando o Modelo Logit Ordenado. Foi observado que o impacto da implantação das melhorias propostas possui magnitude maior que as características socioeconômicas das pessoas. Pessoas que atualmente utilizam o automóvel particular para seus deslocamentos diários são menos propensos à inclusão da bicicleta nos seus deslocamentos, assim como as que possuem filhos. A disponibilidade de vestiário com chuveiro e armário mostrou-se a variável mais importante para o estímulo do uso da bicicleta. A presença de um bicicletário interno e seguro, disponibilidade de bicicletas para empréstimo no local de trabalho e a presença de ciclovias no trajeto também apresentaram impactos significativos. O impacto da disponibilidade de treinamento para o uso de bicicleta foi significativamente menor que os observados nas outras variáveis. Considerando a viabilidade econômica e os benefícios observados, recomenda-se a implantação de vestiário e bicicletário, como medida de estímulo ao uso da bicicleta para os deslocamentos até o trabalho. / Most metropolitan areas mitigate transportation problems by increasing road infrastructure for motorized vehicles. This practice results in an increase in traffic congestion, noise and environmental pollution and reduction in the population’s physical activity levels. Many cities have tackled these externalities by transforming their road system into an attractive environment for Active Transport Modes - walking or cycling. As an example, the city of Porto Alegre has invested in the expansion of its cycling network since 2010. According to the literature, cycling infrastructure is one of the main factors that influence the use of bicycle for transportation, especially to work. The purpose of this thesis was to evaluate the impact of implementing different measures to improve the use of bicycle for commutes using as case study Companhia Riograndense de Saneamento (CORSAN). The evaluated measures included availability of changing rooms, cycle parking, bike sharing systems, training on bicycle use, and cycle paths. An Ordered Logit Model was estimated based onStated Preference data. The impact of the proposed measures has greater magnitude than employee’s socioeconomic characteristics. Individuals who currently use the private car for commute are less likely to use bicycles for those trips, as well as those with children. The availability of a changing room with shower and locker proved to be the most important variable to increase bicycle use among CORSAN employees. Cycle parking inside the building in a safe place, a bike sharing system and the presence of cycle paths along the way also had significant impacts. The impact of training availability for bicycle use was significantly lower, compared to other variables. This research also suggests that implementation of changing room and appropriate parking facilities for bicycles are affordable and important measures to promote the use of bicycle for commutes to work.
193

HPV pro městský provoz a seniory / Citybike

Černý, Pavel January 2011 (has links)
Content of this diploma thesis is a construction design of human powered vehicle for city ride with a focus on seniors. It deals with the issue of bicycle in city traffic and rates construction modern citybikes with a view to their weaknesses for the purpose. The basis of this work is a design frame with custom geometry, which is fitted commonly available components. Using FEM analysis are revealed critic areas of construction and results are used to optimize the frame.
194

Effekter av att prioritera cyklande i korsningar : Cykelöverfarten som medel att nå politiska mål om jämställdhet, trafiksäkerhet och hållbara transporter / Effects of prioritizing bicyclists in road crossings : The prioritized bicycle crossing as means to reach political goals of gender equality, traffic safety and sustainable transport

Helleberg, Tomas January 2020 (has links)
För att studera effekterna av att samhället prioriterar cyklande i ej signalreglerade korsningar, har en tvärvetenskaplig litteraturstudie om attraktiv cykelinfrastruktur och trafiksäkerhet genomförts tillsammans med en före-efter studie som genomförts vid fyra nya cykelöverfarter som byggts i Umeå. Cykelöverfarten är en ny typ av korsning som infördes 2014 som prioriterar cyklande likt gående prioriteras på övergångsställen efter den så kallade zebra-lagen, men cykelöverfartens utformningskrav med hastighetsäkring skyltar och vägmarkering innebär att korsningar måste byggas om för att bli cykelöverfarter, och deras spridning i landet varierar, där Gävle kommun tidigt har varit framstående. I trafikstudien har cyklandes kön, väjningsbeteende, riktning och hastighet noterats, samt motortrafikanters väjningsbeteende, totalt har ca 4700 trafikanters noterats och över 800 interaktioner mellan cyklist och bilist observerats. Resultatet visar främst på en stor skillnad mellan cyklande kvinnor och män på cykelpassager, där kvinnor väjer mer för bilar än män, men också att denna skillnad minskar när en cykelöverfart anläggs. Mindre än hälften av interaktioner mellan bilar och cyklar sker enligt trafikreglerna på cykelpassager. Potentialen att öka väjning mot cyklande med en cykelöverfart beror till stor del på utformning och hur väjningsbeteendet såg ut före insatsen då väjningsbeteende på cykelpassager varierar mycket mellan platser, medan en väl utformad cykelöverfarten visar på en god potential att nå 90% väjningsgrad med liten variation mellan platser. Hälften av cyklande i Sverige som skadas i krock med bilar skadas i korsningar, där kvinnor är mer drabbade än män. Cykelns hastighet upp till 25km/h och biltrafikens ofta höga hastighet gör det svårt för trafikanter att hinna se och väja i tid i korsning, varför cykelöverfartens varningsskyltar och hastighetssäkring för motortrafiken, samt goda fria siktlinjer är avgörande för en förutsägbar och trygg trafikmiljö med färre hårda inbromsningar. Trafikstudien visar att cyklandes hastighet ökar med i genomsnitt 2 km/h på cykelöverfarter för de flesta cyklande. Det har i tidigare studier visats att risken för olyckor inte ökar när cykelöverfarter anläggs och i litteraturstudien bekräftas detta även på teoretisk grund, cykelöverfarten har god potential att med rätt utformning skapa trafiksäkra platser där cyklister inte behöver vara modiga för att ta sig fram. Just trygghet är en viktig faktor i cykelplanering då upp till hälften av befolkningen undviker att cykla av rädsla snarare än att inte kunna eller vilja cykla. Då kvinnor är dokumenterat mer otrygga cyklande än män kan trygghetssatsningar i cykelplaneringen som cykelöverfarter betraktas som jämställd-, eller om man vill, feministisk trafikplanering. En god cykelinfrastruktur medger snabba, trygga och trevliga resor med cykel, snarare än att behöva motiveras av hälsa och miljöskäl. En god cykelinfrastruktur kännetecknas av breda släta vägar utan hinder med god separation från gående och bilar, vilket även gynnar de gående och även drift och underhållsfrågor då en mer komplicerad utformning försvårar exempelvis snöröjning. Cykelöverfartens hastighetssäkring gör cykelbanan både slätare och ökar vattenavrinning även utanför interaktion med andra trafikslag. Gående och cyklande bör separeras för bådas skull, men det kan generera konflikter i gränslandet mellan separation och gemensamma ytor med gång och cykelvägar som ofta är gemensamma jämfört med de uppdelade gång & cykelöverfarterna eller passager. Alternativa utformningar bör övervägas där det antingen finns en konsekvent separation mellan gående och cyklande, eller att man ser över behovet av övergångsställen i lågtrafikerade korsningar som istället kan vara enbart cykelöverfart som kan anpassas för ledstråk. För en ökad cykling är cykelinfrastruktur att betrakta som en hygienfaktor, vill man nå längre krävs hela-resan perspektivet både vad gäller parkering, omklädning och ekonomiska incitament, samt att för biltrafiken minska framkomlighet och parkeringsutbud. Antalet bil – cykelinteraktioner i korsning är beroende av trafikflödet i båda riktningar och kommer koncentreras till några få platser och tidpunkter i staden vilka kan prioriteras i arbetet, samtidigt som behovet av trafiksäkerhetshöjande åtgärder är stor även där interaktioner är mer osannolika längst exempelvis cykelpendlingsstråk och skolvägar. / To study effects of prioritizing cyclists in non-signalized road crossings, a cross discipline literature study about attractive bicycle infrastructure and traffic saftey for cyclists has been conducted, along with four observational before and after studies when prioritized bicycle crossings are built in Umeå, Sweden, the Swedish ‘Cykelöverfart’ was introduced in 2014, with demands on speed reduction and signage, where car drivers needs to yield to cyclist just like they are to yield to pedestrians at zebra crossings in Sweden since 1999. In this study the cyclist’s genders, yielding behavior, direction and speed been noted, along with motor traffic yielding behavior, in a total of 4700 vehicle movements have been noted and more than 800 bicycle – car interactions have been reviewed. The main result is that there is a big difference in male and female yielding behavior on bicycle in interaction with cars at a unprioritized road crossing, where cycling women yield more than men, but also that this difference between men and women decrease when a cykelöverfart is built. Less than half the car – bicycle interaction at unprioritized road crossings where bicyclist should yield are done in accordance with traffic rules. The potential to increase car drivers yielding to bicyclists with a cykelöverfart depends the crossing and the yielding behavior before since it varies a lot. A well built cykelöverfart has the potential to reach correct 90% yielding behavior. Half the bicyclists injured in car crashes in Sweden are injured in road crossings and women are worse off than men. The bicycle speed of up to 25 km/h and the often too high speed of motor traffic makes it hard for road users to be able to see and yield in time, this is why the mandatory warning signs and speed bump for the motor traffic, and free sight lines are important for a predictable and safe traffic environment with less hard breaking. The traffic study shows that most bicyclist increase their crossing speed with about 2 km/h, but also that the speed of cyclists varies a lot. Previous studies have shown that the risk of accident does not increase when a cykelöverfart is built, and in the literature study this is confirmed on a theoretical level. The cykelöverfart has good potential with the right configuration to create safe places with high traffic safety, where cyclists do not need to be brave to ride. The feeling of saftey is an important factor in bicycle planning since up to half the population limit their cycling because of fear rather than not wanting or being unable to cycle. Since women in studies feel more unsafe than men in traffic, efforts to increase the feeling of saftey, like the cykelöverfart, could be viewed as gender equal traffic planning, or if you want to, feminist traffic planning. Good bicycle infrastructure allows for quick, safe and pleasant trips rather than having to motivate cycling with health or environmental reasons. High grade bicycle infrastructure is characterized by flow on wide smooth roads with few obstacles, well separated from pedestrians on cars, which also protects pedestrians. Wide smooth paths are also easier for operation and maintenance where a more complex configuration complicates for example enough clearing of snow. The cykelöverfart speed bumps makes the cycle track smoother and increase water run-off even when not in interaction with traffic. Pedestrians and cyclists should be separated for both sake, but conflicts can be generated in unclear situations, where combined walking and cycling tracks leads to segregated walking and biking crossings. Alternative configurations should be considered where either the walking and cycling path is also segregated, or that the need for a zebra crossing in low traffic environment are necessary, which in place can be only a cykelöverfart that is made to work for the sight impaired too. For an increased bicycle traffic, bicycle infrastructure is some what of a hygiene factor, if you want to reach higher level of cycling the need to consider the entire trip rises, as well as parking, dressing rooms and economic incentives, and also that car traffic is slowed, have less roads and less or more expensive parking opportunities. The number of bicycle – car interactions are dependent on the flow of traffic in both directions and will be concentrated to a few places and times in a city, places that can be prioritized in the work of bicycle planning, at the same time as the need to increase traffic safety where fewer interactions occur, along cycling routes and close to schools.
195

Electric bicycle rack for an urban environment : A bicycle rack that caters for the needs for electric bicycles in today’s society

Pålsson, Susanne January 2020 (has links)
More and more people commute to work, travel and use the electric bicycle as a daily means of transport. The need for bicycle racks, adapted for electric bicycles is growing and the demands on bicycle racks are higher than for bicycle racks for ordinary bicycles. This as they are very expensive to buy. On behalf of NOLA Industries, a bicycle rack for electric bicycles will be designed. The bicycle rack must also meet the need to recharge the batteries while the bicycle is parked and meet all found requirements from all stakeholders, which were collected during the project. The project is carried out by one student from Luleå University of Technology, who is studying M.Sc. in industrial design with a focus on product development. The project was carried out in Luleå with NOLA at a distance in Stockholm. The aim of the project was to come up with an idea for a bicycle rack that is suitable for public environments and that also fits into NOLA’s existing product range. At the beginning of the project, the time was planned using a Gantt scheme. The process used was CDIO consisting of four different phases. After the planning was completed, a benchmarking was made of how the situation looked and how the electric bicycles in today’s society work. The theory section was planned and introduced with a description of the line of technical design. The chapter was then followed up with relevant theory for the project. In order to find out what users think of existing bicycle racks and what were the desires for future bicycle racks, a survey was sent out. The work continued with several different information collection methods which were then followed up with creative work in the design phase. The final work included CAD models and renderings from keyshot of the finished concept. The final concept meets stakeholder requirements for an electric bike rack. It fulfill the need to be able to recharge the electric bike’s battery and to lock the electric bike in several points. The roof and the bicycle racks are equipped with led lighting, counteracting vandalism and theft of the electric bicycles. The roof also protects the electric bicycles against weather conditions.
196

Predicting Bicyclist Comfort in Protected Bike Lanes

Foster, Nicholas Mark-Andrew 05 August 2014 (has links)
Long popular in northern Europe, protected bike lanes, also known as "cycle tracks" or "separated bike lanes," are seeing increased interest in the United States. One of the primary benefits of protected bike lanes is that they may provide a higher level of comfort than a standard bike lane that is only delineated by an inches-wide painted stripe. Several methods exist for quantifying the quality of service provided by a roadway for a bicyclist; however, many of these models do not consider protected bike lanes and of those that do, none are based on empirical data from the US. This is problematic as engineers, planners, and elected officials are increasingly looking to objective performance measures to help guide transportation project design and funding prioritization decisions. This thesis addresses this gap by presenting a cumulative logistic model to predict user comfort on protected bike lanes using surveys conducted in the United States. The model is for road segments only and not signalized intersections. It is developed from the results of in-person video surveys conducted in Portland, Oregon. The survey was completed by 221 individuals who viewed 20 video clips each. The model is validated using 3,230 responses to a survey of those who have ridden on protected bike lanes in multiple cities around the US. A cumulative logistic model is used because it predicts the distribution of ratings, providing a clearer picture of a facility's performance than a mean value produced by a simple linear model. The resulting model indicates that buffer type, one-way vs. two-way travel, motor vehicle speed, and motor vehicle average daily traffic volumes are all significant predictors of bicyclist comfort in protected bike lanes. Survey results also show that protected bike lanes are generally more comfortable than other types of on-street infrastructure, consistent with previous research findings.
197

Mapping Stockholm's Bike-share Future : A GIS-based Analysis of Bicycle-sharing Stations in Stockholm / Kartläggning av Stockholms lånecykelsystem : En GIS-analys av lånecykelstationer i Stockholm

Hagwall, Rut January 2023 (has links)
In cities all over the globe, bicycle-sharing systems are being implemented as a way of promoting bicycling as the primary mode of transportation. Cities encourage the residents to bicycle as a way of improving local environments and reducing traffic congestion. A step in this direction is providing a bicycle-sharing system, which increases the accessibility and mobility in a city. For the availability of a bicycle-sharing system to be maximized, the locations of the docking stations must be carefully selected and analyzed. Several studies have been conducted where the availability of bicycle-sharing systems have been evaluated, using different approaches. However, no studies have been conducted in Stockholm on the newly established Stockholm eBikes bicycle-sharing system. Thus, this thesis aims to evaluate the location of bicycle-sharing stations and determine the most suitable locations of those in Stockholm. This is done through a GIS-based MCDM method which applies an Analytical Hierarchy Process to weigh the criteria that must be considered. The analysis is done in QGIS, an open-source GIS-software, with data from OpenStreetMap and local data sources. The results indicate that the suitability of the current bicycle-sharing stations in Stockholm is high considering the analyzed criteria. Further, a suggestion is given for locations where the suitability for bicycle-sharing stations is high. This suggestion proposes new locations in Stockholm where a bicycle- sharing station could increase the availability of the bicycle-sharing system as well as the mobility in the city.
198

Intressekonflikter i gaturummet : En kvalitativ studie om cykelplanering och ett urval av kommuners hantering av intressekonflikter i en svensk kontext / Conflicts of interest in the street space : A qualitative study in bicycle planning and a selection of municipalities’ handling conflicts of interest in a Swedish context

Sofia, Södergren January 2022 (has links)
För att skapa ett hållbart transportsystem och uppnå en förändrad färdmedelsfördelning finns det nationella målsättningar om att öka andelen persontransporter med gång-, cykel- och kollektivtrafik till minst 25 procent 2025. En satsning på dessa färdmedel går också i linje med Sveriges miljömål och etappmålet om att minska transportsektorns klimatutsläpp med 70 procent till 2030 jämfört med utsläppsnivån 2010. Många kommuner har därför som mål att öka resorna med de hållbara transportslagen. För att möjliggöra detta är en ökad planering och utbyggnad av infrastrukturen för dessa färdmedel viktig och i flera kommuner görs det idag gatuombyggnader för att skapa mer utrymme till de hållbara transportslagen. När åtgärder för att förbättra infrastrukturen ska genomföras ställs olika intressen och funktioner mot varandra och prioriteringar måste göras. Detta leder till intressekonflikter mellan de olika trafikslagen, men också mellan de olika trafikslagen och andra intressen. Syftet med uppsatsen är att undersöka vad det finns för intressekonflikter mellan cykeltrafiken och andra intressen i gaturummet, vad som händer om utrymmesbehovet för cykeltrafiken hamnar i konflikt med andra behov och intressen och hur detta hanteras av ett antal kommuner. Detta har undersökts genom en metodkombination bestående av en enkätundersökning och intervjuer. Både respondenterna och intervjudeltagarna arbetar vid kommuner som är med i föreningen Svenska Cykelstäder, en förening som arbetar för ökad, bättre och säkrare cykling. Intervjuerna utgör grunden i studien medan enkätundersökningen har varit ett sätt att skapa förståelse för om, och i så fall på vilket sätt olika kommuner upplever att det finns intressekonflikter mellan cykeltrafiken och andra behov och intresse och hur dessa vanligtvis hanteras.  Resultatet från enkätundersökningen visar att alla respondenter upplever att det finns intressekonflikter mellan cykeltrafiken och andra intressen. Studien visar att det finns intressekonflikter mellan cykeltrafik och biltrafik, kollektivtrafik samt gångtrafik. Det finns också intressekonflikter mellan cykeltrafik och andra intressen såsom stadsliv, grönytor, yta för dagvattenhantering och exploatering. Studien visar också att trots nationella målsättningar som handlar om att prioritera de hållbara transportslagen så är steget från strategi eller ambition till genomförande inte självklart. Bilnormen är fortfarande stark, vilket medför att det är svårt att genomföra åtgärder som förbättrar för cykeltrafiken som sker på bekostnad av biltrafiken. Studien visar att cykeltrafiken har svårt att hävda sig gentemot biltrafik och kollektivtrafik, vilket resulterar i att cykeltrafiken nedprioriteras i gaturummet där det redan är trångt. Detta förklaras med hjälp av teorierna stigberoende och urban space wars. Studien visar också att det underlag som de tillfrågade kommunerna har för att hantera intressekonflikter är vanligtvis kommunernas riktlinjer för hur cykeltrafikens infrastruktur ska utformas. Där anges vilka standarder och bredder som cykelvägnätet ska ha, vilket innebär att det underlag som finns för att hantera intressekonflikter är begränsat. / To enable a sustainable transport system and achieve a changed distribution of means of transport, there are national objectives to increase the proportion of passenger transport by foot, bicycle and public transport to at least 25 percent by 2025. An investment in these means of transport is also in line with Sweden's environmental goals and the milestone goal of reducing the transport sector's climate emissions by 70 percent by 2030 compared to the emission level in 2010. Many municipalities therefore aim to increase journeys with sustainable modes of transport. In order to make this possible, increased planning and expansion of the infrastructure for these means of transport is important, and in several municipalities’ street reconstruction is currently being done to create more space for the sustainable modes of transport. When measures to improve the infrastructure are being implemented, different interests and needs are placed against each other, and priorities must be defined. This results in a conflict of interest between the different means of transport, but also between the different means of transport and other interests. The purpose of the essay is to investigate what conflicts of interest exist between bicycle traffic and other interests in the street space, what happens if the need for space for bicycle traffic ends up in conflict with other needs and interests, and how this is handled by a number of municipalities. This has been investigated through a combination of methods consisting of a survey and interviews. Both the respondents and the interview participants work at municipalities that are part of the association Svenska Cykelstäder, an association that works for increased, better and safer cycling. The interviews form the basis of the study, while the survey has been a way of creating an understanding of whether, and if so in what way, different municipalities feel that there are conflicts of interest between bicycle traffic and other needs and interests and how these are usually handled. The results of the survey show that all respondents feel that there are conflicts of interest between bicycle traffic and other interests. The study shows that there are conflicts of interest between bicycle traffic and car traffic, public transport and pedestrian traffic. There are also conflicts of interest between bicycle traffic and other interests such as urban life, green spaces, surface for stormwater management and urban development. The study also shows that despite national goals that deal with prioritizing the sustainable modes of transport, the step from strategy or ambition to implementation is not obvious. The car norm is still strong, which means that it is difficult to implement measures that improve bicycle traffic at the expense of car traffic. The study shows that bicycle traffic has difficulty asserting itself against car traffic and public transport, which results in bicycle traffic being deprioritized in the street space which is already crowded. This is explained using the theories of path dependence and urban space wars. The study also shows that the basis that the municipalities have for handling conflicts of interest are usually the municipalities' guidelines for how the bicycle traffic infrastructure should be designed. It specifies the standards and widths that the bicycle road network should have, which means that the guidelines available for handling conflicts of interest are limited.
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[pt] CICLOVIA VIÁVEL: INDICADORES DE RISCO NAS DIMENSÕES SOCIAL, TÉCNICA E AMBIENTAL PARA A GESTÃO PÚBLICA MUNICIPAL / [en] VIABLE BICYCLE PATH: RISK INDICATORS IN THE SOCIAL, TECHNICAL AND ENVIRONMENTAL DIMENSIONS FOR MUNICIPAL PUBLIC MANAGEMENT

GUILHERME MARINS PESSANHA 26 October 2021 (has links)
[pt] Do crescente uso da bicicleta em grandes cidades emerge a necessidade de projetos urbanísticos que promovam a integração entre o modal cicloviário e os demais meios de transporte urbano, enquanto processos mais eficientes de manutenção dos caminhos cicláveis enfrentam a descontinuidade na administração pública com suas mazelas como a interrupção de projetos e a ausência de dados históricos. Este trabalho apresenta o conceito de Ciclovia Viável para áreas urbanas de metrópoles considerando o uso de indicadores modelados nas dimensões social, técnica e ambiental. O indicador proposto pode mitigar a ausência de dados estruturados servindo como ferramenta para planos de integração entre os modais e de conservação dos caminhos cicláveis. O quadro teórico revisado aponta para quatorze critérios voltados à avaliação de níveis mínimos de serviços no atendimento a demandas de ciclistas e orientados ao monitoramento da qualidade de ciclovias. O modelo do Índice da Ciclovia Viável é testado empiricamente por meio de levantamentos de campo em três ciclovias mantidas pela gestão pública municipal do Rio de Janeiro. Os seguintes indicadores são registrados: Ciclovia do Flamengo (Índice da Dimensão Social = 0,31, Índice da Dimensão Técnica= 0,88, Índice da Dimensão Ambiental= 0,82); Leme-Copacabana (IDS= 0,30, IDT= 0,82, IDA= 0,88) e Barra da Tijuca (IDS= 0,16, IDT= 0,78, IDA= 0,88). Percebe-se que a dimensão social figura como a menos favorecida nas três avaliações, significando um alerta de insuficiência de ciclovias com acessibilidade às pessoas que residem em áreas subnormais. / [en] The practice of cycling has been following our civilization for over a century. In recent decades, the so-called developed or developing countries have come to consider the cycling mode in their public policies, especially in urban mobility plans. In recent decades, the application of urban mobility policies by bicycles has gained prominence in the Brazilian scenario, especially in Rio de Janeiro. The history of Rio s bicycle lanes began in 1991, when the first bicycle lanes were built from a program for the redevelopment of the city s waterfront known as the Rio Orla. The program built 23 km of cycle paths intended primarily for leisure. From 1993, after the United Nations Conference on Environment and Development - ECO92, based in the city of Rio de Janeiro, the Municipal Secretariat of Environment of the Rio de Janeiro City Hall was created. In 2010, the city incorporated the Rio - Urban Capital of Bicycle Mobility project into the Urban Mobility Plan - PMU as a transportation alternative and as a modal element for short distances and for the purpose of integrating Bus Rapid Transport - BRT systems. trains and subway. In 2008, the Rio de Janeiro city cycling plan had the goal of expanding its 150 km network in 2009 to 450 km by the end of 2016. However, a cycling infrastructure is not only sustained by its length, but a set of socio-spatial criteria is required for its effectiveness. The Ministry of Cities, in its Bicycle Mobility Plan in Cities (Ministério das Cidades, 2007), states that linking with different transport systems is a key factor for bicycles to be adopted by the population while traveling and that urban infrastructure in cities must adapt to this mode. The observation of the use of bicycles in large cities, with varied and constantly changing technologies and organizations, was the starting point of the research that used a bibliographic review in search of concepts and methods of evaluation of the service level and the quality of the bicycle lanes and cycle tracks. There are several bicycle lane settings, depending on their applications. Similarly, the concepts of service level and the qualitative evaluation applied to these infrastructures also vary. For this research, these concepts follow those of large metropolises around the world with characteristics of planned cities and contribute to a new concept, built here, called Viable Bicycle Path Index (VBI). Once the new concept is defined, it is now feasible to develop a model capable of aggregating relevant information for the assessment of bicycle paths. Therefore, after surveying studies on national and international bicycle-related indexes, Brazilian technical standards and norms and urban elements necessary for the formation of a viable bicycle path, this research presents a methodological design with several elements (dependent and independent variables) that represent the landscape around bicycle paths in neighborhoods of the city capital.
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Towards a Comprehensive Bicycle Motion Behavior Model and Naturalistic Cycling Dataset

Alazemi, Fahd 25 May 2022 (has links)
Most of the existing bicycle flow traffic research is limited to characterizing the longitudinal motion of bicyclists based on the assumption that there is no significant differences between the dynamics of a single-file bicycle traffic and the longitudinal motion behavior of cars. This research reparametrizes an existing car-following model to describe bicycle-following and motion behavior. Furthermore, the lack of naturalistic data has limited the validation of this model. This research aims at developing a descriptive model that is capable of capturing the inherent non-lane-based traffic behavior characteristics of bicycle traffic and provides a methodology for extracting naturalistic cycling data from video feeds for use in safety and mobility applications. In this study, The Fadhloun-Rakha (FR) bicycle-following longitudinal motion model was extended through complementing it with a lateral motion strategy; thus allowing for overtaking maneuvers and lateral bicycle movements. For the most part, the following strategy of the FR model remains valid for modeling the longitudinal motion of bicycles except for the activation conditions of the collision avoidance strategy which are modified in order to allow for overtaking when possible. The proposed methodology is innovative in that it makes use of the intersection of certain pre-defined regions around the bicycles to decide on the feasibility of angular motion along with its direction and magnitude. The resulting model is the first point-mass dynamics-based model for the description of the longitudinal and lateral behavior of bicycles in both constrained and unconstrained conditions, and it is the only existing model that is sensitive to the bicyclist physical characteristics and the bicycle and roadway surface conditions given that the used longitudinal logic was previously validated against experimental cycling data. In relation to the development of the naturalistic cycling dataset, the used videos come from a dataset collected in a previous Virginia Tech Transportation Institute study in collaboration with SPIN in which continuous video data at a non-signalized intersection on the Virginia Tech campus was recorded. The research applied computer vision and machine learning techniques to develop a comprehensive framework for the extraction of naturalistic cycling trajectories. In total, this study resulted in the collection and classification of 619 bicycle trajectories based on their type of interactions with other road users. The results confirm the success of the proposed methodology in relation to extracting the locations, speeds, and accelerations of the bicycles with a high precision level. Furthermore, preliminary insights into the acceleration and speed behavior of bicyclists around motorists are determined. / Master of Science / The behavior of bicycle traffic differs from the that of cars. Bicycle traffic flow dynamics is unconstrained in lateral motion and overtaking when compared to car traffic flow. Based on this inherent behavior, existing car-following can only model the longitudinal motion of the bicycle flow traffic and it does not describe the non-lane base traffic that characterizes bicycle traffic dynamics. Furthermore, the existing experimental controlled dataset used for validating bicycle traffic flow models does not capture the naturalistic behavior of cyclists. Therefore, this research aims to develop a descriptive model that is capable of capturing the inherent non-lane-based traffic behavior characteristics of bicycle traffic and provides a methodology for extracting a naturalistic cycling data from a video dataset for use in safety and mobility applications. In this study, the Fadhloun-Rakha (FR) bicycle-following longitudinal motion model was extended through complementing it with a lateral motion strategy; thus allowing for overtaking maneuvers and lateral bicycle movements. For the most part, the following strategy of the FR model remains valid for modeling the longitudinal motion of bicycles except for the activation conditions of the collision avoidance strategy which are modified in order to allow for overtaking when possible. The proposed methodology is innovative in that it makes use of the intersection of certain pre-defined regions around the bicycles to decide on the feasibility of angular motion along with its direction and magnitude. The resulting model is the first point-mass dynamics-based model for the description of the longitudinal and lateral behavior of bicycles in both constrained and unconstrained conditions, and it is the only existing model that is sensitive to the bicyclist physical characteristics and the bicycle and roadway surface conditions given that the used longitudinal logic was previously validated against experimental cycling data. In relation to the development of the naturalistic cycling dataset, the used videos come from a dataset collected in a previous Virginia Tech Transportation Institute study in collaboration with SPIN in which continuous video data at a non-signalized intersection on the Virginia Tech campus was recorded. The research applied computer vision and machine learning techniques to develop a comprehensive framework for the extraction of naturalistic cycling trajectories. In total, this study resulted in the collection and classification of 619 bicycle trajectories based on their type of interactions with other road users. The results confirm the success of the proposed methodology in relation to extracting the locations, speeds, and accelerations of the bicycles with a high precision level. Furthermore, preliminary insights into the acceleration and speed behavior of bicyclists around motorists are determined.

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