This seems AI generated, it's certainly word soup with no indication there'll be a fourth colour. The original researchers (from North Caroline State University)[0] said the next step was a a scale model test bed.

Discussion (17 points, 10 months ago, 29 comments) https://news.ycombinator.com/item?id=39726898

Research papers:

Advancing the white phase mobile traffic control paradigm to consider pedestrians (Mar 2024)[1]

White Phase Intersection Control Through Distributed Coordination: A Mobile Controller Paradigm in a Mixed Traffic Stream (Feb 2023)[2]

[0]: https://news.ncsu.edu/2024/03/traffic-signal-pedestrians-veh...

[1]: https://onlinelibrary.wiley.com/doi/10.1111/mice.13178)

[2]: https://ieeexplore.ieee.org/document/10038635

> This innovation could someday revolutionize traffic management by 2025.

We read this so you didn't have to. Nothing but slop, presented in a way to make you think it's going to happen.