USA HISTORY

Detailed explanation-1: -As Central Pacific laid tracks eastward, Union Pacific was working westward and the race to Promontory Summit, Utah, where they would eventually meet on May 10, 1869, was on.

Detailed explanation-2: -By connecting the existing eastern U.S. rail networks to the west coast, the Transcontinental Railroad (known originally as the “Pacific Railroad") became the first continuous railroad line across the United States. It was constructed between 1863 and 1869.

Detailed explanation-3: -In 1862, the Pacific Railroad Act chartered the Central Pacific and the Union Pacific Railroad Companies, tasking them with building a transcontinental railroad that would link the United States from east to west.

Detailed explanation-4: -The story goes that on May 10, 1869, the Central Pacific Railroad’s tracks from the west were connected to the Union Pacific Railroad’s tracks from the east in Promontory Summit, Utah.