An official journal of Tsinghua University Communications in Transportation Research publishes peer-reviewed high-quality research representing important advances of significance to emerging transport systems. The mission is to provide fair, fast, and expert peer review to authors and insightful theories, impactful advances, and interesting discoveries to readers. We welcome submissions of significant and general topics, of inter-disciplinary nature (transport, civil, control, artificial intelligence, social science, psychological science, medical services, etc.), of complex and inter-related system of systems, of strong evidence of data strength, of visionary analysis and forecasts towards the way forward, and of potentially implementable and utilizable policies/practices. To be more specific, the scope of expected submissions includes but is not limited to: Interactions among transportation systems and other systems Integrations of emerging technologies with transportation systems Big data analytics in transportation area Advances and discoveries in transportation area Forward-looking judgment for future transportation systems Emerging technologies/products and their impact on transportation Novel transportation modes and associated analytics Governmental initiated transportation policies and impact analysis Mobility as a service Field experiments of emerging transportation technologies Transportation electrification, automation, and connectivity Communications in Transportation Research is a fully open access journal. It is co-published by Tsinghua University Press and Elsevier, and co-sponsored by the State Key Laboratory of Automotive Safety and Energy (Tsinghua University) and China Intelligent Transportation Systems Association (ITS China). At its discretion, Tsinghua University Press will pay the open access fee for all published papers from 2021 to 2025.