Split service brake system.
Split service brake system. A brake system consisting of two or more subsystems actuated by a single control designed so that a leakage-type failure of a pressure component in a single subsystem (except structural failure of a housing that is common to two or more subsystems) shall not impair the operation of any other subsystem.
49 CFR § 393.5
As used in this part, the following words and terms are construed to mean: