Aqueduct system is still used today in many places. One of the aqueducts people in Rome in the medieval times still stand today, right under the roads of present day Rome.
It was vital for the Roman's development in technology, it helped a lot with irrigation and transportation of water. It improved their lives greatly because it gave them easy access to water.
They are canals that provide water to the populated areas of Rome. A great any of them are suspended in channels above ground that travel for many miles.
aquaeducts - what they do is "aquam ducere" - they lead the water (long distances until the center of roman cities - the ancient roman water-supply-system).