A car control device includes a pneumatic manifold with a plurality of fluid ports integrally formed in a housing. The configuration of the manifold and ports enables fluid communication with a brake valve, and a control valve module. The car control device also includes a functional control module in electric communication with a power management module, the control valve module, and the network. Each of the power management module, and the control valve module, the functional control module, and a battery assembly are all positioned to separately accessible within a housing.