Chinese cities have a long legacy of bicycle use due to relatively low incomes, dense urban development, and short trip lengths. Because of tremendous economic growth resulting in increased motorization and spatial expansion of cities, trips are becoming longer and more difficult to make by bicycle. As a result, electric powered twowheelers have risen in popularity over the past five years. Touted as environmentally friendly vehicles, they are capable of traveling 450 kilometers on a single charge and emit zero tailpipe emissions. However, many cities are banning electric twowheelers from city streets, citing safety and environmental problems. They do have significant environmental impacts because they use lead acid batteries and electricity, which is predominantly generated from coal power plants, but they also have significant mobility benefits that are seldom considered. This research investigates the tremendous growth of electric twowheelers in China and compares their environmental and safety impacts to those of alternative modes; such as public transportation, or personal cars. This research also analyzes the benefits of electric twowheelers in terms of increased mobility and accessibility to opportunities due to their increased speed and range. Electric twowheelers tend to be more energy efficient and produce less air pollution per kilometer traveled than many other modes. Also, to the extent that they displace car trips, they improve the safety of the transportation system in Chinese cities. While electric twowheelers do have some problems that need to be addressed (namely excessive lead and battery pollution), they provide large benefits and can be a successful strategy toward a sustainable transportation future.

In 2005, 10 million electric bikes were produced in China. Strong domestic sales are projected for coming years, raising concerns about the sustainability and potential regulation of this fairly new mode. Policy makers are wrestling with developing policy on electric bikes with little information about who uses them, why they are used, and what factors influence electric bike travel. This paper probes these questions by surveying electric bike usage in two large Chinese cities, Kunming and Shanghai. Demographic comparisons are made between the different modes and cities as well as differences in travel patterns. Electric bike users are found to travel considerably more than bicycle users. Also, most electric bike users would travel by bus if electric bikes were unavailable. This suggests that electric bikes are less of a transitional mode between human-powered bikes and full-blown automobile ownership, and more an affordable, higher quality mobility option to public transport. (C) 2007 Elsevier Ltd. All rights reserved.

Electric bikes have captured a large share of trips in many Chinese cities. They provide high levels of mobility and use little energy, two things that Chinese cities need to optimize. However, these benefits come at a cost, particularly emissions from primarily coal power plants and increased lead waste from battery use. Chinese policy makers are struggling with developing appropriate policy that maximizes modal options and mobility and minimizes environmental impacts. Electric bikes use very little electricity and, as a result, emit low levels of pollution per vehicle (passenger) kilometer traveled, even compared to fully occupied buses. The most problematic issue with electric bikes is the use of lead acid batteries that have high lead loss rates during the production, manufacturing and recycling processes. Most other motorized modes also use lead acid batteries, but their rate of use is lower and thus they have lower lead emission rates per kilometer. This research investigates and quantifies the environmental implications of electric bike use in China; particularly energy use, air pollution, solid waste and water use. A framework for policy analysis is presented and potential regulatory mechanisms are discussed. This investigation can inform policy by quantifying environmental impacts so that problematic parts of the life cycle can be addressed, rather than banning electric bikes all together.

Despite rapid economic growth in China during the past decade and the rise in personal car ownership, most Chinese still rely on two-wheeled vehicles (2WVs) or public transport for commuting. The majority of these 2WVs are bicycles. In recent years, concern about poor air quality in urban areas and rising energy costs have caused cities to ban gasolinepowered scooters in city centers. Simultaneously, a new 2WV mode emerged to fill the void: the electric bike (e-bike). This shift to e-bikes is occurring rapidly throughout China, especially in its cities. E-bike sales reached 10 million per year in 2005 as more bike and public transit users shifted to this mode. City planners and policy makers are undecided on how to plan for and regulate e-bikes because it is not yet clear what effect they will have on travel behavior, public transportation use, and safety. To begin to understand these effects, bike and e-bike users were surveyed in Shijiazhuang, a medium-size city with particularly high 2WV use, to identify differences in travel characteristics and attitudes. The following conclusions were reached (partial list): (a) e-bikes are enabling people to commute longer distances, with important implications for energy use, accessibility, and urban expansion of cities; (b) people underserved by public transportation are shifting to e-bikes; and (c) women feel safer crossing intersections on an e-bike compared with a regular bike, but they have strong reservations about increasing e-bike speed capability.

Many cities in the United States are facing challenges associated with antiquated urban arterials, whose purpose has changed greatly since their development. Once considered the main streets of the city, with thriving businesses and attractive residential development, many have deteriorated over the decades for a number of reasons, including shifting demand for housing and retail development and the construction of parallel high-speed urban expressways. Because of the complexity of the problems associated with these arterials, a great challenge of transportation and land use planners is to develop a systems-level approach to revitalize and reinvent these arterials in a manner that encourages environmental, economic, and social sustainability. Presented is a methodology to revitalize multimodal urban arterials that includes land use planning, traffic and transit operations management, street redesign, and community participation to improve the conditions of such arterials. Analysis is carried out by using these principles on San Pablo Avenue, a major arterial in the San Francisco Bay Area in California. By using these analysis techniques, land use and transportation recommendations are made that will facilitate sustainable development along this corridor.

Electric two-wheelers have become a significant mode of transportation in China in the past decade. Though marketed and publicized by some as zero-emission vehicles, little past research has been done to quantify the environmental impacts of electric two-wheelers in China. This paper quantifies some of the environmental impacts of the production processes and use phase of electric two-wheelers and compares them to the environmental impacts of competing modes, including bicycles, buses, motorcycles and cars. The use phase emissions are quantified geographically with significantly higher emissions in coal rich regions, compared to regions relying more on hydropower. The results show that electric two-wheelers emit several times lower pollution per kilometer than motorcycles and cars, have comparable emission rates to buses and higher emission rates than bicycles. Lead is one pollutant on which electric two-wheelers perform poorly, because of their use of lead acid batteries.