Soo saar magacyada shirkadaha dhisay Tareenka Baasifigga
Context:Wadada tareenka ee transcontinental ee Mareykanka waa khad kasta oo tareen oo xiriir ah oo isku xira goob ku taal xeebta Baasifigga ee Mareykanka oo leh hal ama in ka badan oo ka mid ah jidadka tareenka ee nidaamyada tareenka ee bariga ee ka shaqeeya inta udhaxeysa Wabiyada Missouri ama Mississippi iyo xeebta Atlantic ee Mareykanka. Qorshihii ugu horreeyay ee la taaban karo ee tareenka transcontinental ee Mareykanka waxaa loo soo bandhigay Congress-ka Asa Whitney sanadkii 1845.  Tareeno badan oo la dhisay sadexdii qeybood ee ugu dambeysay qarnigii 19aad waxay abuureen shabakad gaadiid oo waddanka oo dhan ah oo isku xirta waddanka tareenka. Midda ugu horreysa, oo ah 3,103 km (1,928 mi) "Railroad Pacific", waxaa dhisay Central Pacific Railroad iyo Union Pacific Railroad si ay ugu xirmaan San Francisco Bay ee Alameda, California, shabakadda tareenka bari ee hadda jirta ee Council Bluffs, Iowa / Omaha, Nebraska, taas oo abuurtay tareenkii ugu horreeyay ee transcontinental adduunka markii la furay 1869. Dhismaheeda waxaa suuragelisay dowladda Mareykanka iyada oo la raacayo Xeerarka Tareenka Baasifigga ee 1862, 1864, iyo 1867. Wadada asalka ahi waxay aad ugu dhowdahay wadada Interstate 80 ee hadda jirta.
"Railroad Pacific" waxaa dhisay Central Pacific Railroad iyo Union Pacific Railroad.