Riders of the CTA, Pace and Metra are asked to give a friendly "thank you" to bus drivers, rail operators and all workers.
People can also use #TEAD to express appreciation to those who keep the city's transit systems moving 24 hours a day.
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The CTA asked riders if there was an employee that has made their experience extra special.
To give a direct shout out to a specific employee visit transitchicago.com/feedback/.