Final answer:
The ASCE's Report Card for America's Infrastructure rankings are based on surveys of engineers, business executives, and maintenance workers in order to assess the quality of various infrastructure categories.
Step-by-step explanation:
The ASCE's Report Card for America's Infrastructure rankings are based on the scores from surveys of engineers, business executives, and maintenance workers. These surveys collect data on various aspects of America's infrastructure, such as transportation, water systems, and energy. The scores provided by these professionals help determine the overall grade for each infrastructure category, which is then aggregated to create the final report card.