egrets@lemmy.world to BestOfLemmy@lemmy.worldEnglish · 8 months agoWhy upgrading existing train tracks to high-speed is a costly challengelemmy.worldexternal-linkmessage-square0linkfedilinkarrow-up12arrow-down10
arrow-up12arrow-down1external-linkWhy upgrading existing train tracks to high-speed is a costly challengelemmy.worldegrets@lemmy.world to BestOfLemmy@lemmy.worldEnglish · 8 months agomessage-square0linkfedilink