Yes, a fare card issued by the Chicago Transit Authority can be used on both buses and trains. The fare card offers convenience and flexibility for passengers who travel within the city using various modes of public transportation. Riders can tap their fare card on the card reader at train turnstiles and also present it to the fare box when boarding a bus. It is important to ensure that the fare card has sufficient balance for the trip. Additionally, the Chicago Transit Authority provides various fare options, including single-ride tickets and unlimited ride options, to cater to different travel needs. For more detailed information about fares, types of cards available, or how to add balance, it is advisable to visit the official Chicago Transit Authority website.