A time-space (TS) traffic diagram, which presents traffic states in time-space cells with color, is an important traffic analysis and visualization tool. However, most TS diagrams that have already existed or are being produced are too coarse to exhibit detailed traffic dynamics and the current way of contrasting a TS diagram using rectangular cells is inconsistent with the basic traffic characteristics. This talk will introduce two works to improve TS diagrams: (1) the TS diagram refinement problem and a multiple linear regression-based solution so as to increase the resolution of a TS diagram and enable it to present ample traffic details; (2) a new way of constructing a TS diagram with the consideration of traffic wave direction. The works will “save” widely existing TS diagrams from their blurry “faces” and enable TS diagrams to show more traffic details.
Zhengbing He is a senior research fellow with the Senseable City Lab, Massachusetts Institute of Technology. Prior to joining MIT, he was a full professor at Beijing University of Technology, China. His research interests include traffic flow theory, urban mobility, and sustainable transportation. He has published more than 140 academic papers, and he was listed as world’s top 2% of scientists. He serves as an Associate Editor for IEEE TITS and an Editorial Advisory Board Member for TR Part C, etc. Learn more on his website.