What is the principal duty of porters as indicated in the instructions?

The principal duty of porters is to assist passengers with luggage. This role is vital in ensuring that travelers have a pleasant experience, particularly when managing their belongings while boarding or disembarking from trains. Porters play a crucial role in customer service by helping passengers with heavy bags or multiple items, thereby enhancing the overall travel experience.

While handling ticket sales, keeping the station clean, and monitoring train schedules are important functions within the rail transport system, these activities typically fall under the responsibilities of other staff members, such as ticket agents or custodial staff. Porters focus primarily on providing assistance directly related to passenger luggage, reflecting their role as facilitators of comfortable and efficient travel.