Yes, the Ventra system can be used on both buses and trains within the Chicago Transit Authority network. Ventra provides a convenient way for passengers to pay for fares using the Ventra Card, which can be loaded with funds or unlimited rides through the Ventra App or online. Riders can tap their Ventra Card on the designated card readers when boarding buses and at train station turnstiles. The system is designed to streamline the fare payment process, making it easier for commuters to navigate the extensive transit network in Chicago. Additionally, the Ventra App offers features such as real-time information, allowing users to plan their trips more efficiently. For further details, it may be helpful to review the current information available on the Ventra Chicago website.