Chicago scrooges who take public transportation may be unable to avoid holiday cheer in the coming weeks. CTA’s decked-out holiday bus is hitting the road Tuesday, and its dazzling holiday train will start ferrying customers across the city on Friday. Themed CTA vehicles have been spreading holiday cheer across the Windy City in some shape or form since 1992, when a sign with the phrase “Season’s Greetings from the CTA” was put on the front of an out-of-service Blue Line train used to deliver food to charity, according to the CTA. This year, when the holiday train pulls into a station, Santa will wave to riders from a sleigh on a flatcar outfitted with reindeer and decorated trees.