What revolutionary transport came after railroads?

After railroads, the revolutionary transport that emerged was the automobile. The mass production of cars, particularly with Henry Ford's introduction of assembly line techniques in the early 20th century, made personal vehicles accessible to a broader population. This shift transformed urban planning, mobility, and the overall landscape of transportation, leading to the development of extensive road networks and a car-centric culture. Additionally, the rise of commercial aviation in the mid-20th century further revolutionized long-distance travel.