Browsing by Author "Ng, Wei-Shiuen"

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    China motorization trends: New directions for crowded cities
    (Journal of Transport and Land Use, 2010) Ng, Wei-Shiuen; Schipper, Lee; Chen, Yang
    This paper examines two major emerging constraints on transport in fast-growing Chinese urban cities: oil supply and urban infrastructure. The research considers automobile technology, alternative fuels, and mobility choices, as well as policy measures that could be adopted to reduce the use of oil for transport and greenhouse gas emissions. Three transport energy scenarios, “Road Ahead,” “Oil Saved,” and “Integrated Transport,” illustrate potential motorization trends given different policy, vehicle technology, alternative fuels, and driving-behavior assumptions. In the Integrated Transport scenario, where congestion and space constraints favor small and vehicles moving at slower speeds, gasoline and electric cars are the highest in use. Oil consumption in the Integrated Transport scenario is only 12 percent of its value in Road Ahead by 2020, while carbon emission is 79 percent lower. Policies such as vehicle technology and fuel requirements, while important, are not as crucial as integrated land use development, taxation of vehicle use, road pricing, and the prioritization of public and non-motorized transport that could trigger a world of fewer, smaller and more efficient cars. According to experiences around the world, fuel and carbon dioxide concerns alone are not strong enough to promote a change in the path of individual motorization.
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    Work schedule flexibility and parking preferences
    (Journal of Transport and Land Use, 2017) Ng, Wei-Shiuen
    The flexibility of work schedule affects the number of commute trips made per week and the number of hours spent at work, which can influence congestion and transportation emission levels. Understanding the linkages between the flexibility of work schedule and travel behavior will provide insights for policies targeted at transportation and parking demand management. This study uses the University of California (UC) Berkeley campus as a study site. UC Berkeley is one of the largest employers in the San Francisco Bay Area with over 11,000 employees, leading to a wide range of employment type, job characteristics, and varying levels of work schedule flexibility. A total of 86 one-on-one interviews were conducted with UC Berkeley employees. This study explores common factors that contribute to UC Berkeley employees’ parking preferences and considers how academic discipline or employment type could affect work schedule, which in turn influences travel behavior. Driving is the most popular choice across employment type and job categories. However, not all employees who drive alone have the same parking location preferences. The flexibility of work schedule is one of the key factors that influences parking preferences at the workplace, especially when there are alternative parking locations.