Therefore the United States standard railroad gauge of 4 feet , 8.5 inches is derived from the original specifications for an Imperial Roman war chariot .
Since the chariots were made for Imperial Rome , they were all alike in the matter of wheel spacing .
The United States standard railroad gauge of 4 feet , 8.5 inches is derived from the original specifications for an Imperial Rome   war chariot .
Since the chariots were made for Imperial Rome , they were all alike in the matter of wheel spacing .