• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 83
  • 31
  • 20
  • 18
  • 9
  • 5
  • 4
  • 4
  • 3
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 209
  • 45
  • 40
  • 34
  • 34
  • 34
  • 27
  • 27
  • 24
  • 22
  • 21
  • 19
  • 17
  • 17
  • 16
  • 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.
1

Integrace maloobchodní sítě s cyklistickou dopravou podle koncepce Bike&Shop / The integration of retail net with bicycle transportation according to Bike&Shop conception

Švihelová, Sylva January 2014 (has links)
The still increasing intensity of an individual motor transport (IMT) in cities becomes unsustainable. Moreover, the establishment of new retail centres (RCs) continues to escalate it, because their business policy is principally aimed to motorised costumers. Furthermore, a rapid turnover of goods, which enables low prices, along with a wide range of goods under one roof make RCs more attractive than traditional small shops in the inner-city. Therefore, these small shops have been shut down, and people must travel longer distances in order to reach the required services. The purpose of my thesis is to find a possibility how to replace by doing shopping the common automobile transport with cycling. This kind of transport is environmentally friendly and energy-saving, occupies less urban space, is accessible for everyone and also healthy, is reciprocally advantageous, it sustains quite large attraction zone, and up to 5 km it is even faster. In this thesis, for the first time defined Bike&Shop conception introduces the integration of retail net with bicycle transportation. It was inspired by already familiar Bike&Ride system. Bike&Shop concept illustrates advantages of shopping by bike, as well as instruments which can help to develop this way of shopping. The theoretical part is based on foreign...
2

A Proposal for a Protected Bicycle Route in Tucson, Arizona, Feasibility and Implications for Public Health and Safety

Patterson-Markowitz, Carl Benjamin January 2015 (has links)
Sustainable Built Environments Senior Capstone Project / The city of Tucson is well known for its cycling culture and year-round moderate climate. It is a ‘Gold’ level cycling community according to the League of American Bicyclists. Less known about Tucson is that it can be a dangerous place to ride a bicycle. In an attempt to improve overall cyclist safety, the idea of implementing protected bike infrastructure is explored. With a focus on using protected bike lanes to create a low-stress network for bike movement, this project creates a rubric, and calibrates it against case-studies in New York City, Chicago, and Washington D.C., to analyze the potential streets in Tucson possess to host protected bike lanes.
3

Exploring new possibilities of renting bicycles in urban space.

Kupfer, Deborah January 2013 (has links)
Bike sharing is a service, spread over the world and often finds recognition by being made available to almostanyone, providing affordable access in urban space and becoming an alternative to motorized transportationand vehicles.But does bike sharing now answer our needs and desiresin our every day practice in town? Are there possibilitiesto enhance the sharing experience?How to adress the ones that do not make use of the service yet?By keeping close sight to users throughout my project and involving them into my process, it helped me understandhow they want to make use of the bicycles and the service to meet their expectations.These understandings and keyfindings I translated towardsbike sharing and its conclusion defines my proposal.Resulted is a link to StorStockholms Lokaltrafik and bike sharing, a “muscle driven individual public tranportalternative” to the already established public networksystem in Stockholm‘s urban space.Driven by values such as accessibility, flexibility and reliability, I envisoned in a fictional collaboration with SL, the SL Cykel.The SL Cykel covers a Product Service System, embededin the tbana areas and accessed by SL‘s smart card.Based on different modes of traveling, this proposal is meant to be a self-regulating system, which encouragesits customer to become active part in the service and its flexibility.
4

Bicycle commuting: developing an effective and comprehensive active transportation network in Winnipeg, Canada

Yuen, Raymond 21 February 2013 (has links)
Winnipeg, Canada received $20.4 million from the three levels of government to augment the city’s active transportation infrastructure. Like many North American cities, Winnipeg is an automobile-focused centre that experienced little funding or development towards active transportation until recently. Winnipeg’s current active transportation system is insufficient, poorly conceived, and fractured. As cities move towards environmentally friendly initiatives, Winnipeg has an opportunity to build comprehensive and safe access to all parts of the city through active transportation. Concentrating on the bicycle as the primary transportation mode, this study examines the current status of Winnipeg’s active transportation network and searches for areas of improvement/development. This study identifies critical areas needing improvement and offers solutions by integrating input from Winnipeg’s cycling community, standards established by government/industry bodies, and successes from other jurisdictions. Key issues include bicycle facilities, safety and education and their integration into an effective and comprehensive bicycle transportation network.
5

Bicycle commuting: developing an effective and comprehensive active transportation network in Winnipeg, Canada

Yuen, Raymond 21 February 2013 (has links)
Winnipeg, Canada received $20.4 million from the three levels of government to augment the city’s active transportation infrastructure. Like many North American cities, Winnipeg is an automobile-focused centre that experienced little funding or development towards active transportation until recently. Winnipeg’s current active transportation system is insufficient, poorly conceived, and fractured. As cities move towards environmentally friendly initiatives, Winnipeg has an opportunity to build comprehensive and safe access to all parts of the city through active transportation. Concentrating on the bicycle as the primary transportation mode, this study examines the current status of Winnipeg’s active transportation network and searches for areas of improvement/development. This study identifies critical areas needing improvement and offers solutions by integrating input from Winnipeg’s cycling community, standards established by government/industry bodies, and successes from other jurisdictions. Key issues include bicycle facilities, safety and education and their integration into an effective and comprehensive bicycle transportation network.
6

Development of German pedelec (and bicycle) accidents between 2012 and 2020

Schleinitz, Katja, Petzoldt, Tibor 19 December 2022 (has links)
In the recent years, pedelecs (pedal electric cycles) have seen a massive growth. in ridership. In 2013, around 1.3 million e-bilces were on German roads, while in 2020, this number was already at 8.5 million (with about 99% of the e-bikes being pedelecs). The rapid spread of pedelecs has given rise to concerns for road safety, especially due to the fact that riders of electric bicycles reach higher speeds. Indeed, some studies have reported that pedelec riders suffer from more severe crashes than users of conventional bikes. However, the highly dynamic development in pedelec ownership and use might cast some doubts on the long term validity of investigations of pedelec accidents and their characteristics that have to rely on data collected over shorter periods of time. Therefore, the aim of this study was to investigate pedelec accidents and their characterutics over several years in a longitudinal fashion. and compare them to accidents involving cyclists, tobe able to identify trends, and to clarify whether such trends are specifiic to pedelecs. [From: Introduction]
7

Monitoring cykloturistiky v ČR / Monitoring of cycletourism in Czech Republic

Schlechter, Vojtěch January 2008 (has links)
Main goal of this work is to analyze the cycletourism from many points of view. The thesis has topics such as -cycleroutes -imports, exports and production of bicycles -financing of cycletourism -cycling in city -cyclist and his evaluation of services for cycletourism -greenways
8

Assessing Barriers and Motivators for Use of a Trail for Active Transportation in a College Town

FitzPatrick, Timothy Michael 30 May 2017 (has links)
A high amount of the US population is not physically active, contributing to rates of heart disease and obesity. One strategy to increase physical activity is to use more active transportation, defined as walking or biking for transit. Besides increasing physical activity levels, active transportation can provide other benefits such as decreased air pollution from cars. College campuses provide opportunities for active transportation as most residences are close to campus. Therefore, we examined reasons for use and barriers to active transportation in students living in a community connected to a large university via a 1.9 mile, paved protected trail. Two pedestrian and bicycle counters were placed to find the number of walkers and bikers on the trail per day and students were recruited to take an online survey. We found that more people used the trail during the weekday compared to the weekend. Students did not receive much support from their friends and family to use the trail. Users of the trail were more likely to believe that using active transportation helps protect the environment while non-users were uncomfortable using a bike. Barriers included the time it took to use the trail and the need to carry items. Both users and non-users indicated that a financial incentive would motivate them to use the trail more. We conclude that non-users may be uncomfortable using a bike and worry about carrying their items for class. Changing university parking fees, providing bike lessons, and placing signs with directions and time to campus may increase active transportation to the university via this trail. / Master of Science
9

Cyklisters preferenser för val av cykelväg : En studie om vägval och preferenser vid cykling genom Öst på stan i Umeå

Edler, Jonathan January 2017 (has links)
Denna studie berör studenters preferenser när det gäller transporter som görs med cykel. Studien begränsas till området Öst på stan med universitetsområdet och centrum som start och målpunkt inom Umeå kommun. Studien bygger på en fallstudie där ett 70-tal studenters resonemang och åsikter behandlas utifrån vad som är mer och mindre attraktiva inslag rörande cykelvägars utformning. Samt om det finns andra beståndsdelar som är viktiga vid val av cykelväg förutom utformningen. Deras åsikter preciseras både genom en kvantitativ enkätundersökning samt en kvalitativ gruppintervju. Vidare genomfördes en tematisering för att strukturera den data som framkommit från respondenterna.   Respondenterna utrycker att cykelvägarna bör erbjuda god framkomlighet och standard för att dessa ska anses värda att användas. Exempel på positiv utformning är: God sikt, underhåll av vägens hårda ytor samt hantering av snö och vatten. Även vägbredd och separering är attraktiva inslag för god utformning. Utöver utformning är kopplingar mellan målpunkter viktigt för att vägen ska anses användarvänlig. De slutsatser som dras inom studien är att Öst på stans fyra cykelvägar erbjuder olika standard sinsemellan. Kvalitén på vägarna anses ändå så pass bra att detta inte inverkar i valet av färdväg. Vad som spelar in i valet av färdväg för respondenterna är istället den upplevda kopplingen mellan de två målpunkter som behandlas för denna fallstudie. Samt den upplevda tid det tar att nyttja en väg. Den upplevda kopplingen är i sin tur baserad på den lokalkännedom som studenterna har om platsen. Detta innebär således att valet av cykelväg grundas främst på den kännedom studenter har om möjliga vägar och i andra hand vilka punkter dessa vägar kopplar samman för detta studieområde.
10

Optimizing Bike Sharing Systems: Dynamic Prediction Using Machine Learning and Statistical Techniques and Rebalancing

Almannaa, Mohammed Hamad 07 May 2019 (has links)
The large increase in on-road vehicles over the years has resulted in cities facing challenges in providing high-quality transportation services. Traffic jams are a clear sign that cities are overwhelmed, and that current transportation networks and systems cannot accommodate the current demand without a change in policy, infrastructure, transportation modes, and commuter mode choice. In response to this problem, cities in a number of countries have started putting a threshold on the number of vehicles on the road by deploying a partial or complete ban on cars in the city center. For example, in Oslo, leaders have decided to completely ban privately-owned cars from its center by the end of 2019, making it the first European city to totally ban cars in the city center. Instead, public transit and cycling will be supported and encouraged in the banned-car zone, and hundreds of parking spaces in the city will be replaced by bike lanes. As a government effort to support bicycling and offer alternative transportation modes, bike-sharing systems (BSSs) have been introduced in over 50 countries. BSSs aim to encourage people to travel via bike by distributing bicycles at stations located across an area of service. Residents and visitors can borrow a bike from any station and then return it to any station near their destination. Bicycles are considered an affordable, easy-to-use, and, healthy transportation mode, and BSSs show significant transportation, environmental, and health benefits. As the use of BSSs have grown, imbalances in the system have become an issue and an obstacle for further growth. Imbalance occurs when bikers cannot drop off or pick-up a bike because the bike station is either full or empty. This problem has been investigated extensively by many researchers and policy makers, and several solutions have been proposed. There are three major ways to address the rebalancing issue: static, dynamic and incentivized. The incentivized approaches make use of the users in the balancing efforts, in which the operating company incentives them to change their destination in favor of keeping the system balanced. The other two approaches: static and dynamic, deal with the movement of bikes between stations either during or at the end of the day to overcome station imbalances. They both assume the location and number of bike stations are fixed and only the bikes can be moved. This is a realistic assumption given that current BSSs have only fixed stations. However, cities are dynamic and their geographical and economic growth affects the distribution of trips and thus constantly changing BSS user behavior. In addition, work-related bike trips cause certain stations to face a high-demand level during weekdays, while these same stations are at a low-demand level on weekends, and thus may be of little use. Moreover, fixed stations fail to accommodate big events such as football games, holidays, or sudden weather changes. This dissertation proposes a new generation of BSSs in which we assume some of the bike stations can be portable. This approach takes advantage of both types of BSSs: dock-based and dock-less. Towards this goal, a BSS optimization framework was developed at both the tactical and operational level. Specifically, the framework consists of two levels: predicting bike counts at stations using fast, online, and incremental learning approaches and then balancing the system using portable stations. The goal is to propose a framework to solve the dynamic bike sharing repositioning problem, aiming at minimizing the unmet demand, leading to increased user satisfaction and reducing repositioning/rebalancing operations. This dissertation contributes to the field in five ways. First, a multi-objective supervised clustering algorithm was developed to identify the similarity of bike-usage with respect to time events. Second, a dynamic, easy-to-interpret, rapid approach to predict bike counts at stations in a BSS was developed. Third, a univariate inventory model using a Markov chain process that provides an optimal range of bike levels at stations was created. Fourth, an investigation of the advantages of portable bike stations, using an agent-based simulation approach as a proof-of-concept was developed. Fifth, mathematical and heuristic approaches were proposed to balance bike stations. / Doctor of Philosophy / Large urban areas are often associated with traffic congestion, high carbon mono/dioxide emissions (CO/CO2), fuel waste, and associated decreases in productivity. The estimated loss attributed to missed productivity and wasted fuel increased from $87.2 to $115 between 2007 and 2009. Driving in congested areas also results in long trip times. For instance, in 1993, drivers experienced trips that were 1.2 min/km longer in congested conditions. As a result, commuters are encouraged to leave their cars at home and use public transportation modes instead. However, public transportation modes fails to deliver commuters to their exact destination. Users have to walk some distance, which is commonly called the “last mile”. Bike sharing systems (BSSs) have started to fill this gap, offering a flexible and convenient transportation mode for commuters, around the clock. This is in addition to individual financial savings, health benefits, and reduction in congestion and emissions. Resent reports have shown BSSs multiplying over 50 countries. This notable expansion of BSSs also brings daily logistical challenges due to the imbalanced demand, causing some stations to run empty while others become full. Rebalancing the bike inventory in a BSS is crucial to ensure customer satisfaction and the whole system’s effectiveness. Most of the operating costs are also associated with rebalancing. The current rebalancing approaches assume stations are fixed and thus don’t take into account that the demand changes from weekday to weekend as well as from peak to non-peak hours, making some stations useless during specific days of the week and times of day. Furthermore, cities change continually with regard to demographics or structures and thus the distribution of trips also changes continually, leading to re-installation of stations to accommodate the dynamic change, which is both impractical and costly. In this dissertation, we propose a new generation of BSS in which we assume some stations are portable, meaning they can move during the day. They can be either stand-alone or an extension of existing stations with the goal of accommodating the dynamic changes in the distribution of trips during the day. To implement our new BSSs, we developed a BSS optimization framework. This framework consists of two components: predicting the bike counts at stations using fast approaches and then balancing the system using portable stations. The goal is to propose a framework to solve the dynamic bike sharing repositioning problem, aiming at minimizing the unmet demand, leading to increased user satisfaction and reducing repositioning/rebalancing operations. This dissertation contributes to the field in five ways. First, a novel algorithm was developed to identify the similarity of bike-usage with respect to time events. Second, easy-to-interpret and rapid approaches to predict bike counts at stations in a BSS were developed. Third, an inventory model using statistical techniques that provide an optimal range of bike levels at stations was created. Fourth, an investigation of the advantages of portable bike stations was developed. Fifth, mathematical approach was proposed to balance bike stations.

Page generated in 0.0464 seconds