Playing with SVG files..
Grab a free SVG file of the place you plan to use in your Scene.
I’ll use Paris Subway SVG map for example..
Once imported in Blender you’ll have to clean a little bit SVG and rename Curves to match your Subway lines (Easier later). Maybe you have to work colorimetry too (Color codes available here : https://www.data.gouv.fr/fr/datasets/indices-et-couleurs-de-lignes-du-reseau-ferre-ratp-ratp/)
Adding some lights and a camera, a simple rectangle and make it following a curve..And a little bit of magic and you’re good to go.