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5 A B C D E F G H I J K L M N O P Q R S T U V W Y Z
B B- B. Ba Bb Bd Be Bi Bl Bm Bn Bo Bp Br Bs Bt Bu By
Bab Bac Bad Baf Bag Bal Ban Bar Bas Bat Bau

BASIC OPERATING UNIT

by Metro Digital Resources Librarian • April 14, 2016

In rail rapid transit, the smallest number of rapid transit vehicles that can operate independently in revenue service, usually one to three (exceptionally more) cars. (TRB)

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