Browsing by Author "Diao, Mi"
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Item An integrated microsimulation approach to land-use and mobility modeling(Journal of Transport and Land Use, 2018) Zhu, Yi; Diao, Mi; Ferreira, Joseph Jr.; Zegras, P. ChristopherThis paper presents an overview of the design and status of a new type of land-use simulation module integrated into SimMobility, an agent-based microsimulation platform. The module, SimMobility Long-Term (LT), is designed to simulate how the interrelations between the transportation and land-use systems manifest themselves in the housing and commercial real estate markets, household and firm location choices, school and workplace choices, and vehicle ownership choices. At the heart of the LT simulator is a housing market module simulating daily dynamics in the residential housing market that (a) “awakens” households that begin searching for new housing; (b) accounts for eligibility, affordability, and screening constraints; (c) constructs plausible choice sets; (d) simulates daily housing market bidding; and (e) represents developer behavior regarding when, where, what type, and how much built space to construct, taking into account market cycle and uncertainty. The LT simulator and SimMobility’s activity-based, mid-term (MT) simulator are integrated in that the agents in the LT module (e.g., individuals in households) are the same agents simulated in the MT module (e.g., activity participation and trip-making), and agents’ simulated behaviors in the MT module provide measures of (utility-based) accessibility that figure into relevant decisions in the LT simulator. This paper describes the SimMobility model and the LT framework, presents estimation results for two component models of the housing supply side, and demonstrates the use of the simulator by comparing housing market outcomes with and without the introduction of one year’s worth of supply of new public housing. Overall, the LT simulator represents an effort to advance urban system modelling by explicitly simulating the dynamic interactions of disaggregated agents in real estate markets and encapsulating the information of agents’ daily activity participation in their long-term mobility-relevant choices.Item Introduction to special issue: Rail transit development in China and beyond(Journal of Transport and Land Use, 2019) Diao, Mi; Fan, Yingling; Zhang, XueliangRail transit is widely considered an efficient and environment-friendly means to address the increasing demand for travel. In the past decades, the scale and speed of China's rail transit development has been unprecedented. By the end of 2017, a total of 165 urban rail lines including heavy rail and light rail were in operation in 34 cities in mainland China, with a total track length of 5,033 kilometers (km), and the vast majority of them were built after 2000 (China Association of Metros, 2017). At the intercity scale, China has built the largest high-speed rail (HSR) network in the world, with over 29,000 km HSR lines by the end of 2018 (Central Government of China, 2019). Efforts to develop rail transit are also observed in other cities in both developing and developed countries. We planned this special issue in response to the rapid development of rail transit in China and beyond. In preparation for the special issue, we organized two symposiums to facilitate debates on related research topics in June 2017, including a special session on rail transit at the 11th annual conference of the International Association for China Planning (IACP) hosted by the Harbin Institute of Technology in Harbin, China, and the second Symposium on the HSR Network in China hosted by Jinan University in Guangzhou, China.