主讲人介绍：

美国西北大学2015级博士生罗斯达

Presenter: Sida Luo（罗斯达）
Department of Civil and Environmental Engineering, Northwestern University,
Evanston, Illinois 60201, USA

内容刚要：

Urban transit systems are pivotal to sustainable city growth, because mass transit (such as subways) is capable of carrying large number of travelers, especially compared with private automobiles. This talk focuses on a so-called hybrid transit system that marries the benefit of traditional fixed-route transit with ride-sharing services provided by transportation network companies (TNCs) such as Uber and Didichuxing. An integrated design of the two mobility services over road networks could help resolve the first- and last- mile problem, improving the quality of service. The system design is supposed to consider spatial heterogeneity since the demand often varies across urban space. The speaker hence will present two topics. First and foremost, we examine the effect of the exponential demand pattern – what effects will it have on the hybrid system design? Second, acknowledging that it would be beneficial to accommodate the demand heterogeneity with network supply heterogeneity, we examine more on the heterogeneity pattern. Surprisingly, A spatially heterogeneous system design will not be significantly beneficial when the travel demand is high.

城市公交系统是城市可持续发展的关键，这是由于公共交通（如地铁）能够承载大量旅客，特别是与私人小汽车相比。本次汇报的重点是一种新型的混合公交系统，该系统将传统固定线路公交的优势与Uber和滴滴出行等交通网络公司（TNCs）提供的乘车共享服务结合在一起。基于道路网对以上两种出行服务进行一体化设计，有助于解决第一和最后一英里问题，从而提高公交服务质量。因为需求通常在城市空间内变化，该系统的设计应该考虑空间异质性。因此，这次汇报包含两个主题。首先，我们研究了一种指数需求模式，它对混合公交系统设计会带来什么影响？其次，利用网络供应的异质性来满足需求异质性可能是有益的，从而我们更深入地探究了需求和供给的异质性模式。结果表明，当出行需求很高时，空间异质的设计将不会对系统带来显著的改善。

注意：

本讲座不算次数，感兴趣的同学请遵守会场秩序。