I-Evolution Series luluhlu lwezitimela zedizili ezakhiwe yi-GE Transportation Systems (ngoku ephantsi kwe-Wabtec), eyilelwe ekuqaleni ukuhlangabezana nemigangatho ye-U.S. EPA's Tier 2 yokukhupha umoya kaloliwe eyaqala ukusebenza ngo-2005. Umgca ngumlandeli othe ngqo weGE Dash 9. Uthotho. Iiyunithi zokuqala zemveliso zakhiwa ngo-2003. Iilocomotives ze-Evolution Series zixhotyiswe nokuba yi-AC okanye iinjini zokutsalela ze-DC, ngokuxhomekeke kukhetho lomthengi. Zonke zinikwa amandla yi-injini ye-GE GEVO.[4]

I-Evolution Series yaqanjwa njengenye ye "10 Locomotives That Changed Railroading" nguLoliwe Magazine kwaye yaba kuphela uthotho locomotive eyaziswa emva 1972 ukuba zibandakanywe kolo luhlu.[5]

Iilocomotives zeEvolution Series zezinye zezona zikhululo zithengiswa kakhulu kunye nezona ziphumeleleyo kwimbali yase-United States.

Ezi locomotives zixhotyiswe ngeempondo ze-Nathan Airchime K5HL, kunye nohlengahlengiso olu-2, lwenza i-K5HLR2. Iimpondo zinyuswe ngasemva kunye neentsimbi ezi-2 zijonge phambili kuphela kwaye iintsimbi ezi-4 zijonge ngasemva. Zonke izitimela zisebenzisa ezi mpondo, ngaphandle kwe-ET23DCM nezitimela zamazwe ngamazwe.