Abraham Lincoln signed
the Pacific Railroad Bill in 1862. This bill allowed Congress to hire
two private companies
to build a transcontinental railroad that would connect travel by
rail from coast to coast. It took six years to build the
railroad. Ulyssus S Grant was president by the time it was finished.
Transcontinental Railroad is considered one of the most important
technological advances of the 19th century. But it was not
easy to build.