These statements are describing

Georgia's railroad system.

Explanation:

The first railroad in Georgia was constructed in the 1830s. It connected important cities – Athens, Augusta, Macon, and Savannah.

The railroad eventually helped the construction of the city of Atlanta – first known as Terminus (end of the line, because of the railway), and later as Marthasville. As the railroad sparked the growth of the settlement, two more railroads were eventually made in the city and it grew larger.

The railroad was very popular and used by many, and very soon it claimed the most miles on the Deep South. It continued to expand over time and played important role in the Civil War. Today, the rail system in Georgia continues to be one of the key traffic choices, even though it is being used much less than before.