That seems a very car-centric or American view, with cities built on a grid. Older cities without existing grids can have older metro lines following streets (

That seems a very car-centric or American view, with cities built on a grid. Older cities without existing grids can have older metro lines following streets (a limitation of the time they were built, by cut and cover) but newer ones generally don't follow streets. They provide more direct routes, and new crossings over rivers or to islands. Look at Prague or especially Copenhagen for example. https://openrailwaymap.org//mobile.php?style=standard&lat=55.67858860616847&lon=12.583551406860352&zoom=15 https://openrailwaymap.org//mobile.php?style=standard&lat=55...