Publications

Also on Google Scholar.

Journal Articles

• TR-C 2026Large Language Models for Enhancing Human-Machine Interaction in Autonomous Vehicles: A Comprehensive Survey Zixuan Xu, Zihao Sheng, Sikai Chen, Tiantian Chen Transportation Research Part C: Emerging Technologies, 2026 · Paper · Code Surveys LLM applications in automotive human–machine interaction and organizes them into a MODEL–REASON–ACT framework: human understanding, context-aware reasoning and explanation, and adaptive interaction.
• CTR 2025MetaSSC: Enhancing 3D semantic scene completion for autonomous driving through meta-learning and long-sequence modeling Yansong Qu, Zixuan Xu, Zilin Huang, Zihao Sheng, Sikai Chen, Tiantian Chen Communications in Transportation Research, 2025 · Paper A meta-learning framework for 3D semantic scene completion that pretrains on cooperative-perception data and combines deformable convolution, large-kernel attention, and Mamba blocks.
• IEEE ITS Mag. 2025Personalizing Driver Agent Using Large Language Models for Driving Safety and Smarter Human–Machine Interactions Zixuan Xu, Tiantian Chen, Zilin Huang, Yang Xing, Sikai Chen IEEE Intelligent Transportation Systems Magazine, 2025 · Paper An LLM-based driver agent with memory, perception, control, and action modules that tailors warning content and modality (visual, voice, tactile) to driver characteristics and traffic context.
• TBS 2025Where is morality on wheels? Decoding large language model (LLM)-driven decision in the ethical dilemmas of autonomous vehicles Zixuan Xu, Neha Sengar, Tiantian Chen, Hyungchul Chung, Oscar Oviedo-Trespalacios Travel Behaviour and Society, 2025 · Paper Outstanding Student Paper Award at the 28th HKSTS International Conference. Evaluates how GPT-4-series and Mistral-Large models resolve autonomous-vehicle ethical dilemmas, using a stated-preference design with 13,122 scenarios analyzed with binary logit models and decision trees.

Conference Proceedings

• ITSC 2025LLM-TripPlanner: A Large-Language-Model-Based Agent for Personalized Trip Planning Yiping Liu, Hyungchul Chung, Zixuan Xu, Kitae Jang, Sikai Chen, Tiantian Chen IEEE International Conference on Intelligent Transportation Systems (ITSC), 2025 · Paper An LLM agent that combines retrieval-augmented generation, real-time traffic data, and a city-scale street-view route database for end-to-end personalized trip planning.
• ITSC 2024A LLM-based Multimodal Warning System for Driver Assistance Zixuan Xu, Tiantian Chen, Sikai Chen IEEE International Conference on Intelligent Transportation Systems (ITSC), 2024 · Paper A multimodal warning system that interprets the traffic environment and driver profiles to plan and deliver personalized warnings.