Question: How did George Westinghouse contribute to railroad transportation? My answer: His development of the sleeping car made railroad travel much more comfortable. Correct answer: His invention of air brakes made railroad travel safer and faster. How i know this is correct:

I know this is correct because George Westinghouse is credited with inventing the air brake system for trains in the late 19th century. This invention revolutionized railroad transportation by allowing for quicker stops and increased safety. While Westinghouse did also have involvement in the development of the sleeping car, it was his invention of the air brakes that had the biggest impact on railroad travel.