What percentage of locomotive brakes must be operative before leaving the initial terminal?

Before departing from the initial terminal, it is essential that all locomotive brakes are fully functional. The requirement for 100% operable brakes ensures the safety of the train, crew, and infrastructure during its journey. Having every brake in working condition is critical for effective stopping power and control, particularly in emergency situations. Each locomotive brake plays a key role in the overall braking system, and any malfunction could lead to severe operational hazards. This rigorous standard reflects the commitment to safety in railroad operations, as any compromise on brake effectiveness can result in serious incidents. Therefore, ensuring that all brakes are operative before departure is not just a regulatory requirement but a fundamental safety practice.