Wasn't the original plan to have the and be half R62 and half R142 but thanks to bloomberg he wanted the to be all NTTs so the got all the R62s from the . As for the like you said , people will be confused no matter what ,wether its R62As or R142As because sometimes the announcements or Leds on the R142As stop working . Also there are workers that are happy that R62As are back on the , because the trip is a little shorter . Keep in mind the workers that are not happy about the R62As back on the , when next pick comes try will jump to the , , and to be with the NTTs , same as for the workers on the that aren't happy about the R188s going on the line will try and jump to the , and to be with the R62/As .