Final answer:
The Pacific Railroad Act, which concerned the construction of a transcontinental railroad, did not influence Abraham Lincoln's idea of an Emancipation Proclamation; the act was unrelated to the issues of slavery and emancipation.
Step-by-step explanation:
The influence on Lincoln's decision to issue the Emancipation Proclamation was affected by several legislative actions and events during the Civil War, aimed at defining the status of formerly enslaved people and undermining the Confederacy. Crucial measures leading up to the Proclamation included the Confiscation Acts, which allowed the Union to seize Confederate property, including enslaved individuals, and the abolishment of slavery in Washington, D.C., and the territories.
However, the Pacific Railroad Act, which focused on the construction of a transcontinental railroad, was not related to slavery or emancipation and thus did not influence the Emancipation Proclamation.