The 'Imagine One Day Having This Train Map' meme features a conceptualized transit map, often showing high-speed rail lines connecting major global cities across continents and oceans. It first gained traction in urbanist circles and Twitter's 'Transit Twitter' subculture, representing a utopian vision of public infrastructure. While some use it sincerely to advocate for better public transport, others use it ironically to highlight the absurdity of massive engineering projects or to make jokes about specific local transit failures. The template serves as a visual shorthand for dreaming of a more connected, car-free future, making it a favorite among fans of high-speed rail and city planning.