How do engineers plan for thermal expansion when laying traintracks in deserts where the daytime and nighttime temperatures are vastly different? - https://old.

How do engineers plan for thermal expansion when laying traintracks in deserts where the daytime and nighttime temperatures are vastly different? - https://old.reddit.com/r/askscience/comments/8yxd21/how_do_engineers_plan_for_thermal_expansion_when/ https://old.reddit.com/r/askscience/comments/8yxd21/how_do_e...