Driving at 55 miles per hour saves gas
The Pacific Railroad Act stipulated that the Central Pacific Railroad Company would start building in Sacramento and continue east across the Sierra Nevada, while a second company, the Union Pacific Railroad, would build westward from the Missouri River, near the Iowa-Nebraska border.
Feudalism was the system in European medieval societies of the 10th to 13th centuries CE whereby a social hierarchy was established based on local administrative control and the distribution of land into units.