The term 'blend into traffic' can be summarized by the crossword solution 'MERGE, ' which is a five-letter word. Merging is a driving maneuver in which a vehicle moves from one lane of traffic to another, usually done when entering or exiting a highway. When merging, it is important to do so safely and smoothly, so as to not disrupt the flow of traffic. Therefore, the phrase 'blend into traffic' implies that a driver should MERGE in such a way that they become part of the traffic, rather than disrupting it.