How did the transcontinental railroad affect us commerce?

The Transcontinental Railroad was a railroad line through the United States that united the city of Omaha, Nebraska, with Sacramento in the 1860s, thus uniting the Eastern rail network of the United States with California, on the Pacific coast.

It ended with the famous Golden Spike ceremony held on May 10, 1869 in Promontory, Utah, creating a nationwide mechanized transportation network that revolutionized the population and economy of the American West.

This railroad was considered the greatest American technological achievement of the 19th century. It served as a vital link for industry, commerce and travel, uniting the East and West halves of the United States, and creating new settlements in the West.

a politically correct answer.

northernmost part (disputed, administered) - near indira col, siachen glacier - 35.674520°n 76.845245°e

northernmost part (disputed, claimed) - dafdar near beyik pass - 37°24′00″n 75°24′00″e

northernmost part (undisputed) - near dharwas, chambal district - 33.24902°n 76.82704°e

southernmost part (mainland) - cape comorin - 8.06890°n 77.55230°e

southernmost part - indira point in the nicobar islands - 6.74678°n 93.84260°e

distance between:  

1 & 4 - 3070 km

1 & 5 - 3654 km

2 & 4 - 3269 km

2 & 5 - 3885 km

3 & 4 - 2801 km

3 & 5 - 3430 km

explanation:

legal rights and freedom of speech.i hope that it is correct.

brainliest if correct