You can find the written version of this episode at https://labattu.com/s5c7-roads-railways/
(00:00) Intro
(00:48) Letting traffic move
(04:52) Road surface and foundation
(10:32) Railway tracks
(16:04) Bridges and directional forces
(21:07) Tunnels
(24:52) Trivia: Aqueducts
(26:06) Further reading
(26:23) Outro
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