English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Traffic flow oscillations, including traffic waves, are a common yetincompletely understood feature of congested traffic. Possible mechanismsinclude traffic flow instabilities, indifference regions or finite humanperception thresholds (action points), and external acceleration noise.However, the relative importance of these factors in a given situation remainsunclear. We bring light into this question by adding external noise and actionpoints to the Intelligent Driver Model and other car-following models therebyobtaining a minimal model containing all three oscillation mechanisms. We showanalytically that even in the subcritical regime of linearly stable flow (orderparameter $\epsilon<0$), external white noise leads to spatiotemporal speedcorrelations "anticipating" the waves of the linearly unstable regime.Sufficiently far away from the threshold, the amplitude scales with$(-\epsilon)^{-0.5}$. By means of simulations and comparisons with experimentalcar platoons and bicycle traffic, we show that external noise and indifferenceregions with action points have essentially equivalent effects. Furthermore,flow instabilities dominate the oscillations on freeways while external noiseor action points prevail at low desired speeds such as vehicular city orbicycle traffic. For bicycle traffic, noise can lead to fully developed waveseven for single-file traffic in the subcritical regime.

The Intelligent Driver Model with Stochasticity -- New Insights Into Traffic Flow Oscillations