Transportist (David Levinson)

Transportist (David Levinson)

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Transport systems and policy analysis with frequent AV commentary; academic-meets-practitioner perspective.

Investigating Platoon Formation and Retention Using Reduced-Scale Mobile Robots with Controllers Based on Established Car-Following Models
NewsApr 6, 2026

Investigating Platoon Formation and Retention Using Reduced-Scale Mobile Robots with Controllers Based on Established Car-Following Models

A July 2026 study published in Transportation Research Part C examined platoon formation and retention using reduced‑scale mobile robots (RSMRs) equipped with controllers derived from five classic car‑following models. The researchers implemented the Gazis‑Herman‑Rothery, Gipps, Intelligent Driver Model (IDM), PID,...

By Transportist (David Levinson)
Transportist: April 2026
NewsMar 30, 2026

Transportist: April 2026

The Transportist April 2026 briefing highlights a resurgence of fuel rationing talks in Australia as diesel shortages threaten grocery deliveries and waste collection. It also notes a spate of delivery‑robot mishaps in the United States and tightening e‑bike enforcement, with Seattle...

By Transportist (David Levinson)
Estimating Mode Choice in Decentralized Shared Mobility: A Bagging-Enhanced Heterogeneous Ensemble Method
NewsMar 29, 2026

Estimating Mode Choice in Decentralized Shared Mobility: A Bagging-Enhanced Heterogeneous Ensemble Method

A new study in *Travel Behaviour and Society* introduces the Bagging‑enhanced Stacking Heterogeneous Ensemble Method (BESHEM) to model travel mode choice. BESHEM integrates linear, tree‑based, probabilistic, instance‑based, and neural‑network models through nested bagging and stacking, delivering superior predictive performance. Applied...

By Transportist (David Levinson)
Crowdshipping Participation Among Private Vehicle Users
NewsMar 16, 2026

Crowdshipping Participation Among Private Vehicle Users

The Journal of Urban Mobility published a study examining what drives private‑vehicle commuters in Mumbai to join crowd‑shipping schemes. Using an integrated choice and latent variable model, the authors linked travel time, cost, incentives, income, gender, age, and personality traits...

By Transportist (David Levinson)