The three innovations that played a role in creating vast changes in American society during the Roaring Twenties were:
Assembly-line production for goods,
improved oil refineries.
Transportation like the interstate highways.
The assembly line production of goods allow car manufacturers to produce their product on short time and relatively cheap prices. Improved oil refineries allow easier production of gasoline and transportation like interstate highways give option for people to commute from their house to work with personal cars.