The most significant obstacle building the Transcontinental Railroad was crossing the Sierra Nevada Range and the Rocky Mountains. Some other obstacles were mountains, several kinds of weather, and opposition by the native Americans.
The first line of the Transcontinental Railroad was established in 1869. It minimizes the cost of transportation, goods, and service. This railway line gives the boom to industries to increase production.
The Transcontinental railway boosts the economy of America. The railway makes the benefits the people. they can travel fast, safely, and economically.
Therefore the importance of the railway increased rapidly.
Learn more about Railway connectivity here:
brainly.com/question/12315563