a chloropleth map of europe coloured by the maximum cross-sectional area, the loading gauge, permitted by tracks, relative to GC (the de-facto standard loading gauge for new tracks) red = smaller, purple = bigger. france/italy have narrower networks, sweden and finland have massive ones
https://s3.masto.ai/media_attachments/files/116/250/267/010/458/910/original/5d5c3015645a32bf.png