This conference will focus on themes including the innovative applications of smart transportation systems, the use of big data and the Internet of Things (IoT) in urban environments, green transportation solutions, and the role of artificial intelligence in transportation scheduling and planning. Since its inception in 2021, the conference has successfully held four editions, providing researchers with a platform to showcase their latest research findings, while also fostering in-depth communication and collaboration between industry professionals and academia. Participants will have opportunities to share their latest research outcomes and practical cases through keynote speeches and oral presentations, jointly promoting the sustainable development of smart transportation and city engineering.