Editing 4-2-2 (section)

{{Short description|Locomotive wheel arrangement}}
{{For|usage in video production|Chroma subsampling}}
[[Image:MR 4-2-2 673, Rocket 150, Rainhill, May 1980 Slides184 (9859805644) – edited.jpg|upright=1.35|thumb|The [[Midland Railway 115 Class]] 4-2-2]]
Under the [[Whyte notation]] for the classification of [[steam locomotive]]s, '''4-2-2''' represents the [[wheel arrangement]] of four [[leading wheel]]s on two axles, two powered [[driving wheel]]s on one axle, and two [[trailing wheel]]s on one axle.

Other equivalent classifications are:
:[[UIC classification]]: '''2A1''' 
:[[French classification]]: '''211'''
:[[Turkish classification]]: '''14'''
:[[Swiss classification]]: '''1/4'''

Like other steam locomotive types with single pairs of driving wheels, they were also known as '''singles'''.