Bo-Bo

Bo-Bo is a colloquial term, primarily used in rail transport, referring to a locomotive with two two-axle bogies, where each axle is powered. The designation comes from the UIC classification system, where 'B' indicates two driven axles in a bogie and 'o' indicates axles driven individually. Therefore, 'Bo-Bo' denotes a locomotive with two bogies, each with two individually driven axles. This configuration offers advantages in terms of adhesion and weight distribution, making it suitable for various types of rail service, including passenger and freight trains. The term is widely understood and used by railway engineers and enthusiasts globally.