According to 49 CFR, Part 218, what does lite locomotive consist mean?

Answer: A — Two or more locomotive units coupled without cars attached, which may be operated from a single control stand

The definition of "lite locomotive consist" according to 49 CFR, Part 218, refers specifically to two or more locomotive units that are coupled together without any cars attached. This configuration is notable because it allows for the locomotives to be operated from a single control stand, enhancing operational efficiency and safety. When locomotives are configured in this manner, they can perform testing, maintenance, or movement within yard limits without the need for cars, which might complicate maneuvers. This understanding is crucial for complying with regulatory procedures regarding locomotive movements, signaling, and safety protocols in railroad operations. The other options describe configurations of locomotives that do not align with the regulatory definition of "lite locomotive consist." For example, a single locomotive unit, multiple locomotives with cars attached, or a locomotive coupled to a coach car do not meet the criteria outlined for a lite locomotive consist since they involve either fewer locomotives or additional cars, which alters the operational dynamics defined by the CFR.