🚇The elevated railway was a response to the congestion in New York City, allowing people to travel above the crowded streets.
🌃London developed the underground railway to alleviate congested streets while preserving the city's historical architecture.
🚂The first subway systems used steam locomotives, which later transitioned to electrical power.
🔨The construction of subway systems required innovative engineering methods, such as the tunneling shield.
🌍Subway systems transformed urban transportation, allowing for faster and more efficient travel, and continue to shape modern cities.