What button is pressed on the farebox for senior citizens?

Pressing the specified button on the farebox for senior citizens is crucial for ensuring they are charged the correct fare, which often comes with a discount or is free depending on the program in place. In many farebox systems, button assignments are programmed to represent specific categories of passengers. In this case, pressing the designated button not only properly registers the fare for senior citizens but also triggers any associated features or policies related to their fare options. This helps in maintaining accurate records for fare collection and ensures that senior passengers receive the benefits entitled to them, thereby facilitating a smoother experience for both passengers and operators.