Final answer:
The Transcontinental Railroad resulted in the construction of factories in the East, a population boom in the West, and the importation of European goods.
Step-by-step explanation:
The Transcontinental Railroad had several significant impacts. Firstly, it facilitated the construction of factories in the East, which led to the growth of industries such as steel manufacturing, telephone production, and the invention of the light bulb. Secondly, it enabled more people to move westward as transportation became safer and more efficient. This led to a population boom in the West. Lastly, the Transcontinental Railroad allowed for the importation of European goods into the country, expanding trade and commerce.