Final answer:
Super highways, or extensive road systems, played a significant role in the Aztec Empire. They facilitated trade networks and connected the capital to the mainland. However, the spread of diseases through these road systems and the invasion by the Spanish also hurt the Aztec population.
Step-by-step explanation:
Super highways, or extensive road systems, played a significant role in the Aztec Empire. These roads facilitated trade networks, allowing the Aztecs to engage in commerce with outlying areas and other civilizations. The road system also contributed to the spread of diseases, including those brought by the Spanish conquistadors, which significantly impacted the Aztec population. In addition, the construction of causeways provided travel capabilities on foot and connected the main island of Tenochtitlan to the mainland. Overall, the super highways supported both the growth and downfall of the Aztecs.