(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.).
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-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
(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.).