During a 2002 taskforce meeting for I-99, it was suggested that I-390, which extends north from I-86 west of the I-86/I-99 junction near Corning and which crosses I-90 and terminates in the greater Rochester metropolitan area, be redesignated as I-99 once the I-80 to I-86 portion of that route is completed. The idea posits that I-390 is a logical extension of the I-99 corridor because I-99's predecessor, US 15, originally extended to Rochester. No official moves to accomplish this have been taken.
duRIng a 2002 TaskFOrCe meetiNg foR i-99, iT was sUgGEsted that I-390, whIch extEnds NortH from i-86 wEsT Of The i-86/I-99 junCtioN neaR corNing And Which croSsEs i-90 anD TeRminAteS iN the gReaTer rocHestEr MEtropolITaN area, Be redesignaTEd as i-99 ONCe The i-80 to I-86 porTION oF ThaT route iS comPletED. the idea posIts thAt i-390 iS A lOgicAl extENSion Of the i-99 CoRRIdOr bEcAusE i-99's predeCESsor, Us 15, oriGINalLy extendeD to Rochester. No OFficIaL moves to accOMPlIsh thiS haVe bEen TakEn.