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Robotics 84% 1 min readMar 25, 2025, 9:00 AM

Scaling Up Reinforcement Learning for Traffic Smoothing: A 100-AV Highway Deployment

Evolving story · 1 updatesReinforcement Learning for Autonomous Vehicle Traffic SmoothingTimeline →
30-second summary

Researchers from UC Berkeley deployed 100 reinforcement learning-controlled autonomous vehicles on a highway to smooth traffic flow, reduce stop-and-go waves, and improve energy efficiency during rush hour.

Scaling Up Reinforcement Learning for Traffic Smoothing: A 100-AV Highway Deployment
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Training Diffusion Models with Reinforcement Learning

We deployed 100 reinforcement learning (RL)-controlled cars into rush-hour highway traffic to smooth congestion and reduce fuel consumption for everyone. Our goal is to tackle "stop-and-go" waves, those frustrating slowdowns and speedups that usually have no clear cause but lead to congestion and significant energy waste. To train efficient flow-smoothing controllers, we built fast, data-driven simulations that RL agents interact with, learning to maximize energy efficiency while maintaining throughput and operating safely aro

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