The greatest economic consequence of the transcontinental railroad network was that it

It integrated national market and connected the East with the West.

Explanation:

The coming of the Transcontinental Railroad in America during the 1800s changed the situation of the economy. It connected the East with the West in less time, which supported the West to sell its products in the cities. People conduct trade by expanding markets by transporting goods like crops and livestock. The Railways played a crucial role in shaping industrialization by providing Iron, Steel, coal, and Timber.