Santa poses with Mia, 10, from left, Maya, 11, and Shakita, 10, on the CTA Holiday Bus at the corner of West Jackson Boulevard and South Austin Avenue, Dec. 8, 2023, in Chicago. (John J. Kim/Chicago Tribune)
Journee Thompson, 4, laughs as Santa Claus asks her what she wants for Christmas outside the CTA Holiday Bus at the corner of West Jackson Boulevard and South Austin Avenue. (John J. Kim/Chicago Tribune)
Santa greets children and parents on the CTA Holiday Bus at West Jackson Boulevard and South Austin Avenue, Dec. 8, 2023. (John J. Kim/Chicago Tribune)
Santa rides in an open-air car on the CTA Holiday Train ahead of the 18th Street station in Pilsen on Dec. 12, 2023. (Trent Sprague/Chicago Tribune)
The CTA Holiday Train departs the Ashland Green and Pink Line station on the Near West Side on Dec. 12, 2023. (Trent Sprague/Chicago Tribune)
Passengers take photos as the CTA Holiday Train arrives at the Central Park Pink Line station in North Lawndale on Dec. 12, 2023. (Trent Sprague/Chicago Tribune)
Tyreianna Mabrey, left, and her cousin, Marcus Davis, sit on the CTA Holiday Bus, Dec. 8, 2023, in Chicago. (John J. Kim/Chicago Tribune)
An elf hands out candy canes to children and parents outside the CTA Holiday Bus at a depot on the corner of West Jackson Boulevard and South Austin Avenue, Dec. 8, 2023. (John J. Kim/Chicago Tribune)
A CTA employee hands candy canes to Soledad Bustamante and granddaughter Valentine Bustamante, 3, on the CTA Holiday Train Pink Line on Dec. 12, 2023. (Trent Sprague/Chicago Tribune)
An Allstate insurance company logo is posted above the CTA Holiday Bus sign parked at a depot on the corner of West Jackson Boulevard and South Austin Avenue, Dec. 8, 2023. (John J. Kim/Chicago Tribune)
Jason Janice, with his dogs Lucy, bottom, and Suzie, poses for pictures with Santa Claus and his helpers outside the CTA Holiday Bus at the corner of West Jackson Boulevard and South Austin Avenue, Dec. 8, 2023. (John J. Kim/Chicago Tribune)
The CTA Holiday Train crosses over the Dan Ryan Expressway in the Englewood neighborhood on Nov. 28, 2023. (Trent Sprague/Chicago Tribune)
Santa waves to children and parents on the CTA Holiday Bus, Dec. 8, 2023, in Chicago. (John J. Kim/Chicago Tribune)
Santa Claus sits in his mobile office inside the CTA Holiday Bus, Dec. 8, 2023. (John J. Kim/Chicago Tribune)
Children and parents board the CTA Holiday Bus after it arrives at a depot on the corner of West Jackson Boulevard and South Austin Avenue. (John J. Kim/Chicago Tribune)
Commuters ride a Linden-bound CTA Purple Line Holiday Train, Dec. 8, 2023. (Trent Sprague/Chicago Tribune)
Santa rides into the Washington/Wells CTA “L” stop onboard a Linden-bound CTA holiday train. (Trent Sprague/Chicago Tribune)
Brianna Sanders, 7, poses with Santa and his helpers outside the CTA Holiday Bus. (John J. Kim/Chicago Tribune)
A Linden-bound CTA Purple Line Holiday Train arrives at the Washington/Wells “L” station in the Loop, Dec. 8, 2023. (Trent Sprague/Chicago Tribune)
The CTA Holiday Bus approaches a depot at the corner of West Jackson Boulevard and South Austin Avenue, Dec. 8, 2023. (John J. Kim/Chicago Tribune)