If we just got rid of painted lanes and let self-driving cars flow like water, we could fit way more traffic on the road.
March 23, 2026
Original Paper
On the Capacity of Future Lane-Free Urban Infrastructure
arXiv · 2603.19952
The Takeaway
We assume lanes are essential for order, but this study shows that 'lane-free' traffic allows robot cars to fill every square inch of pavement more efficiently. By mathematically shifting from discrete rows to fluid-like flow, existing streets could handle a massive increase in traffic without needing to be widened.
From the abstract
In this paper, the potential capacity and spatial efficiency of future autonomous lane-free traffic in urban environments are explored using a combination of analytical and simulation-based approaches. For lane-free roadways, a simple analytical approach is employed, which shows not only that lane-free traffic offers a higher capacity than lane-based traffic for the same street width, but also that the relationship between capacity and street width is continuous under lane-free traffic. To test