The most common diagnoses after bicycle accidents are head injuries and fractures on arms and legs. At two of three injured cyclists, head injuries are the primary cause of death and bicycle helmets are a good protection against these injuries. Because the brain is very fragile, even a moderate hit can cause a serious injury. Arms and legs can often be treated, while brain damage could be a permanent disability. The main goal of this paper is to find out what makes students at Linköping University wear a bicycle helmet. The specific aim of this paper is to find out why students at Linköping University do not wear a bicycle helmet when they are cycling. The paper is divided into a literature review and a case study. The literature review delivers an insight into the road traffic safety system and the contributing factors that influence road traffic safety. It covers research analysis of experts about human behavior and gives an overview of relevant facts and figures concerning cycling within Sweden as well as within the European Union. The case study is a survey carried out at Linköping University. The method used is paper questionnaire with the target group of students at Linköping University. The result of the questionnaire is that more information regarding bicycle helmets and cycling as such, bicycle helmets for free or at least for reduced prices and to somehow change the attitudes towards bicycle helmets is important to increase the number of students wearing a bicycle helmet at Linköping University. As the most important reasons for not wearing a bicycle helmet, practical problems due to having no opportunity to fix the bicycle helmet secure to the bicycle, the fear of negative appearance and the discomfort of wearing a bicycle helmet have been mentioned. To increase the usage of bicycle helmets measures like increasing the awareness, reducing the helmet price or providing extra features with the helmet, based on the results of the literature review and the questionnaire, are suggested at the end of this paper.

The study proposes an application of Talens (2003) methodological framework for assessing neighbourhood-level (i.e., non-motorised mode) accessibility, and offers recommendations for improving non-motorized transportation (NMT) accessibility to enhance multimodal integration between bicycles and buses in contemporary North American suburban neighbourhoods. Accessibility (or access) is defined as the average travel time or distance between a given origin and destination along the shortest available street network route. The study considers characteristics of the transportation network such as available route directness, facilities, and transit service provision to determine their impacts on bicycle access. A further methodology for comparing bicycle versus bus modal efficiencies within suburban contexts is developed and applied to the case study. A review of approaches designed to promote bicycling while discouraging personal automobile use provides a toolbox of proven treatments that are applied to a case study of Saskatoon, Saskatchewan a city of approximately 200,000 people. The approach provides a process that can be used by city or transit planners to identify neighbourhoods that lack sufficient access and apply treatments that improve bicycle accessibility and bicycle-transit integration. Results suggest existing potential for the bicycle as an access mode within contemporary suburban neighbourhood transportation networks. The case study supports the notion that suburban bicycle-bus integration could be used as a viable alternative to automobiles for daily home-to-node activity trips, and raises questions about the current allocation of public transit service to suburban routes within the context of the case study. Discussion and conclusions suggest directions for future research in this field of sustainable urban transportation planning.

The multi-speed drive hub mainly makes for change speed with planetary gear trains. It has some advantages such as small, change the shelf steadily to move and difficult to receive external environmental impact. So the multi-speed drive hub has already become the focal point that every bicycle's factory researches and develops gradually. The purpose of this work is to develop a system methodology for the computer-aided design of multi-speed bicycle drive hubs. First, analyzing multi-speed drive hub patents to identify the basic characteristics and requirement of multi-speed drive hub, and using a systematized method synthesizes the feasible gear trains. Second, a method is proposed to determine the feasible multi-speed sequence tables for each planetary gear train. Third, a method is formulated to find the gear ratios and gear teeth according to the feasible multi-speed sequence tables. Fourth, a method is to design and dispose the governors of multi-speed drive hubs easily. Finally, using Visual Basic 6.0 procedure language develop a computer software easy to use by utilizing the above-mentioned procedures, and the results of this work will be benefit to the development and design of multi-speed bicycle drive hubs.

In recent years, with the prevailing of outdoor activity, the bicycle has already become one of the most attractive products on equipment market of the outdoor activity, the bicycle styles on the market are numerous at present, but after most products still introduce the new car fund with the leading brand industry person, other same trades and then imitate with its products. Thesis this purpose lie in use concept , project of design method, put forward one systematized two design theory , bicycle of system. Investigate the basic demand for the business bicycle at first, carry on the performance specification of setting up two bicycles system of the decision¡FSecondly the structure of the frame selected separately, ago it suspend organization in midair, after suspend by organization, handlebar in midair it adjust there aren't device ; Use morphology matrix to solve systematically finally, set up the procedure of formating at the same time , solve the system formated and specify to design.

China faces a very serious environmental situation as a result of severe environmental pollution in the country. Smog in eastern and northern China is a wake-up call for actions to be taken to improve the ecological environment. As a student in landscape architecture, my practicum topic focuses on a design that can reduce the problem of air pollution in China. A bicycle infrastructure design in Nanjing is proposed to encourage people to ride instead of drive. By creating a safe, functional, efficient, recreational and attractive bicycle system, more people will love cycling and realize the importance of “green travel”. At the same time, I would like to try to improve Chinese people’s awareness of environmental protection through a well-designed bicycle infrastructure. / February 2016

This research report examines infrastructure strategies to increase the bicycle commute mode share. By analyzing existing conditions and results from on-campus participatory events, recommendations to improve and increase bicycling at the University of Texas at Austin campus are proposed. This report includes a literature review of sustainable transportation and university campuses, bicycle infrastructure best practices, bicyclist route preferences, evaluations of bicycle infrastructure, the role of bicycling in past master plans at the UT-Austin campus, and bicycling in other university’s plans. Existing conditions analyze the characteristics of streets in and around campus and data from the Bike-UT survey is discussed. Participatory research events are described and their findings analyzed to better understand how current bicyclists perceive spaces on campus and make their route choices. Finally, considering best practices, existing conditions, and findings from campus research events, recommendations are proposed to increase the bicycle mode share on the UT-Austin campus. / text

Bicycle sharing systems (BSS) have emerged as a powerful stimulus to non- motorized travel, especially for short-distance trips. However, the imbalances in the distribution of bicycles in BSS are widely observed. It is thus necessary to reposition bicycles to reduce the unmet demand due to such imbalances as much as possible. This paper formulates a new mixed-integer linear programming model considering the dynamic nature of the demand to solve the repositioning problem, which is later validated by an illustrative example. Due to the NP-Hard nature of this problem, we seek for two heuristics (greedy algorithm and rolling horizon approach) and one exact solution method (Benders’ decomposition) to get an acceptable solution for problems with large instances within a reasonable computation time. We create four datasets based on real world data with 12, 24, 36, and 48 stations respectively. Computational results show that our model and solution methods performed well. Finally, this paper gives some suggestions on extensions or modifications that might be added to our work in the future. / text

ABSTRACT An Examination of Socio-demographic Characteristics and Perceptions of Cycling among Students at Georgia State University (Under the direction of Christine Stauber, Faculty Member) Background: Bicycling as a form of transportation is important to public health and the improvement of the environment by way of sustainable transportation. Active transportation is inversely related to all-cause mortality, obesity, and levels of ozone and greenhouse gases. University communities have been shown to bicycle more than big cities. However, downtown setting of the Georgia State University (GSU) campus poses unique barriers to bicycling. Methods: A cross-sectional study was conducted in fall, 2009 at GSU. To determine perceptions and barriers to bicycling, the sample was divided into cyclists and non-cyclists. Chi square analysis, odds ratios, and multivariate logistic regression were used to compare the socio-demographic characteristics and perceptions surrounding bicycling between the groups. Results: The survey included 314 students; 60% female, 11.1% bicyclists, and mean age of 23. Of the socio-demographic characteristics examined, gender was the only factor significantly associated with bicycling, with males being 6.82 times more likely to cycle. Independent t-tests found that bicyclists viewed the built environment, social support, and future bicycling support more favorably than non-cyclists. Of the built environment factors, distance was the most important barrier to bicycling (OR=2.156, 95% CI= 1.484-3.133). Cyclists and non-cyclists were in agreement that bicycling was unsafe due to motor vehicle traffic, roadway conditions, and theft risk Conclusions: Overall, the findings were consistent with current knowledge about bicycling. The findings show that distance appears to be the most significant barrier to bicycling. Although safety due to roadway conditions and motor vehicle traffic and risk of bicycle theft did not produce significant results, these factors should be addressed in future studies and/or programs. Further investigation into how to alter these perceptions and create safer environments for the community would be beneficial.

Dviračių struktūrinio vientisumo bandymai atliekami vadovaujantis reikalavimais, aprašytais standarte EN 14764:2005:E. Bandymo metu svarsčiais apkrautas dviratis juda per kliūtis, kurios imituoja kelio nelygumus. Bandymai taip pat atliekami vietoj svarsčių naudojant užspaudimą pneumatiniais cilindrais. Šiame darbe pateikiamas bandymo sąlygas atitinkantis dviračio dinamikos rato dinamikos analitinis tyrimas, kurį taikant galima įvertinti skirtingų apkrovos būdų įtaką bandymo sąlygoms ir rezultatų tikslumui. / Main conditions of bicycle structural integrity test are presented in European standard EN 14764:2005:E. The fully-assembled bicycle is mounted on a test machine. Definite weights are applied to it. The bicycle is moved over the obstacles that simulate roughness of the way. The load to bicycle can also be produced by system of pneumatic cylinders. Analytical modeling of the dynamics of bicycle wheel rolled over the obstacle corresponded to the test condition is presented in the work. It allows analytical research of test condition with regard to different loading types and estimation of test result accuracy.

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