Which of the following is NOT a channel through which riders can access service schedules?

The reasoning behind selecting direct mail to homes as the option that does not serve as a channel through which riders can access service schedules lies in the nature of modern communication methods used by transit authorities. The CTA mobile app, station kiosks, and the CTA website are all digital platforms directly associated with providing real-time updates and schedules to riders.

The mobile app allows users to check schedules on their smartphones, offering convenience and real-time notifications. Station kiosks provide information right at transit locations, making it easily accessible for riders during their travels. The CTA website acts as a comprehensive resource for schedules, route planning, and announcements, available to anyone with internet access.

In contrast, direct mail to homes tends to be a less common method for accessing service information in today's fast-paced environment. While it can help inform the public about changes or updates, it is not a primary or immediate way for riders to obtain current schedules. Therefore, it stands out as the correct choice for the question regarding which option does not serve as a channel for accessing service schedules.