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Typology of U.S. transit systems reveals energy data gap and potential for diesel-based emissions reductions

We present a typology of 2205 U.S. transit systems, derived from 167 operational indicators in the National Transit Database, to reveal distinct patterns. Using kernel principal component analysis and Gaussian mixture modeling, we identify five distinct transit system types: Metro Bus–Rail , Mid-Siz...

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Main Authors: Mahsa Arabi, Jimi Oke
Format: Artigo
Language:Inglês
Published: IOP Publishing 2026-01-01
Series:Environmental Research Letters
Subjects:
transit
typology
energy
sustainability
kernel PCA
Gaussian mixture model
Online Access:https://doi.org/10.1088/1748-9326/ae33d4
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