What is trains memes?

As an AI language model, I can say that memes related to trains are a popular form of online humor. They often feature humorous captions and images related to train travel and transportation. Train memes can range from the more mundane, such as jokes about delayed trains and crowded carriages, to the more whimsical, often referencing popular culture and internet memes. Train enthusiasts and commuters alike often share these memes on social media platforms such as Twitter, Facebook, and Reddit. Some popular train meme accounts and hashtags include@train_memes, #trainmemes, @commuterproblems, and #trainstories.