UDVideoQA: A Traffic Video Question Answering Dataset for Multi-Object Spatio-Temporal Reasoning in Urban Dynamics. - Joseph Raj Vishal; Nagasiri Poluri; Katha Naik; Rutuja Patil; Kashyap Hegde Kota; Krishna Vinod; Prithvi Jai Ramesh; Mohammad Farhadi; Yezhou Yang; Bharatesh Chakravarthi (CoRR, 2026)