ArticlePNAS nexus2026
Noise-induced instability of uniform flow in single-file traffic systems.
Article in PNAS nexus, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
6 authors.
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Abstract
Stop-and-go waves in vehicular traffic are commonly explained as a linear collective instability induced by, eg response delays. We explore an alternative mechanism that more faithfully mirrors oscillation formation in dense single-file traffic. The fluctuating drivers' responses, modeled by noise, play a key role in this model; as noise is increased, the base (uniform) flow abruptly switches to stop-and-go dynamics despite its unconditional linear stability. The stop-and-go motion persists only as long as noise is present. We rationalize the instability mechanism in quantitative terms by breaking down the noise into oscillatory driving terms that can be studied separately. Finally, we hint at an analogy with Kapitza's inverted pendulum.
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