Maintaining the exterior cleanliness of rolling stock is not only essential for public image but also plays a role in operational efficiency and long-term surface protection. The Automatic Train Wash Plant is a high-performance system designed for regular, automated washing of train exteriors in depot environments. Built with a modular configuration, it supports seamless integration into existing workflows and can be tailored to accommodate various train lengths, cleaning schedules, and site constraints — delivering consistent results with minimal manual intervention.