How can a Petri net explain the behavior of one of the world’s busiest pedestrian crossings?This video analyzes the Shibuya Scramble Crossing in Tokyo, often perceived as chaotic due to its extremely high pedestrian density, and demonstrates how its operation is in fact governed by a well-structured control logic. The video explains how traffic light phases for vehicles and pedestrians are coordinated to maximize throughput while maintaining safety. Using a Petri net model, the timing, synchronization, and mutual exclusion between traffic flows are made explicit. The model reveals that the apparent disorder of the crossing emerges from a carefully designed and formally structured system. The example illustrates how Petri nets can be used to analyze, communicate, and reason about complex real-world control systems where concurrency, safety, and efficiency are critical. This is video #65 of the BPASeries. Acknowledgements:The author gratefully acknowledges Professor Kimio Momose for hosting him in Tokyo during a sabbatical stay and for providing an inspiring research environment. Sincere thanks are also extended to Professor Wil van der Aalst for introducing Professor Momose and enabling this valuable academic connection.