over against = or just off the high road. Greek. apenanti = facing you. In Mark and Luke katenanti = opposite and below, preferred, here, by all the texts. But the text may have been altered to make Matt, agree with Mark and Luke.
straightway = immediately.
ass . . . colt. Here the two are sent for, because Zec_9:9 was to be fulfilled. In Mark, and Luke, only one (only one being necessary to fulfill the part of Zechariah quoted by Joh_12:14, Joh_12:15).