The Transcontinental Railroad was revolutionary because it changed how people traveled through America. This changed the safety of travel through the country because it was easier to travel east and west (History.com). The reaction to the Transcontinental Railroad was that it increased interest in the west and caused people to enjoy the railroad (“The Transcontinental Railroad”). One of the main companys that were apart of building the Transcontnental Railroad was the Central Pacific (Shmoop.com).