Urban traffic attributed to commercial and industrial transportation is
observed to largely affect living standards in cities due to external effects
pertaining to pollution and congestion. In order to counter this, smart cities
deploy technological tools to achieve sustainability. Suc
本文提出了一个 Digital Twin 级别的概念框架（ Levels of Digital Twin），以帮助实践者规划 DT 部署，明确目标和可交付成果，并制定战略愿景。框架可帮助回答人与 DT 合作时 DT 可以扮演哪些角色以及这些角色可以自动化到何种程度的问题，并通过案例说明了框架的有用性。