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Updated: Feb 14, 2026

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Published on: July 19, 2022
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Noise-enabled goal attainment in crowded collectives
Lucy Liu1, Justin Werfel1, Federico Toschi2,3
1John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138.
Summary
Adding controlled randomness to agent movement prevents traffic jams in crowded spaces. This research optimizes agent density and noise for faster goal achievement, crucial for robot swarms and urban planning.
Area of Science:
- Collective behavior
- Robotics
- Traffic flow dynamics
Background:
- Navigating crowded environments is essential for human and robotic agents.
- Understanding traffic flow is key for efficient movement and system design.
Purpose of the Study:
- To investigate how introducing stochasticity (randomness) in agent motion affects traffic jams and goal attainment.
- To identify optimal agent densities and noise levels for maximizing goal achievement in crowded simulated and real-world environments.
Main Methods:
- Utilized computational simulations to model agent behavior and collective dynamics.
- Developed analytical approximations for swarm goal attainment rates.
- Conducted robotic experiments to validate simulation and theoretical findings.
Main Results:
- A critical level of motion stochasticity was found to prevent persistent traffic jams.
- Analytical models predicted and experiments confirmed optimal agent densities and noise levels for efficient navigation.
- Simple, decentralized navigation strategies proved computationally efficient and effective at moderate densities.
Conclusions:
- Stochasticity in motion is a viable strategy for mitigating traffic congestion in dense environments.
- Decentralized navigation methods offer a promising, efficient alternative to complex central planning for robotic swarms.
- This interdisciplinary approach provides new insights into emergent traffic phenomena.
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