3 ms·
UP is a freight railroad and has around 32k miles of track, and about 10k trains. Also, they need to operate 24/7 in harsh conditions all throughout the US, wes
by foooobaba 5y ago
UP is a freight railroad and has around 32k miles of track, and about 10k trains. Also, they need to operate 24/7 in harsh conditions all throughout the US, west of Mississippi river, so very hot and cold, mountains, desert ect.