There were even dedicated estate railways! https://en.wikipedia.org/wiki/British_narrow-gauge_railways#Estate_railways https://en.wikipedia.org/wiki/British_na

There were even dedicated estate railways! https://en.wikipedia.org/wiki/British_narrow-gauge_railways#Estate_railways https://en.wikipedia.org/wiki/British_narrow-gauge_railways#... Not enough milk in the estate kitchen ? Send a maid with a train to the village to restock! Also on north Germany they have a 60 cm railway connecting an island at low tide: https://en.wikipedia.org/wiki/L%C3%BCttmoorsiel-Nordstrandischmoor_island_railway https://en.wikipedia.org/wiki/L%C3%BCttmoorsiel-Nordstrandis... Or the famous Kurobe Gorge Railway in Japan at 762 mm that goes via hard moutain terrain and 40+ (!) tunnels: https://en.wikipedia.org/wiki/Kurobe_Gorge_Railway https://en.wikipedia.org/wiki/Kurobe_Gorge_Railway (We travelled it once, can recommend, superb experience!) Still apparently even if you switch to electric cars and/or trolley buses tire and road surface abrasion is still apparently a significant pollution hazard. I guess metal wheels on metal rails are less of an issues, so it might make sense to use rail based wehicles more heavily, especially with modern technology improvements (automatic routing/switching, battery powered trains, etc.).