The story
Amtrak operates the Thruway network to extend the reach of its train services, offering connections to destinations not directly served by Amtrak trains. The earliest incarnation was launched in January 1973, to provide a connection between Amtrak's Inter-American in Laredo, Texas, and the Aztec Eagle train run by N de M from Nuevo Laredo, Mexico. The following year, Amtrak launched an agreement with Greyhound allowing for passengers to buy combined bus and rail tickets for connecting services run by the two companies. These services were the predecessors of Thruway Motorcoach. The first Amtrak bus service to bear the name "Amtrak Thruway" was launched in California in 1993. Amtrak launched a significant expansion of Thruway Motorcoach services across the United States in 2014.
From Wikipedia’s article on Amtrak Thruway, shared under CC BY-SA 4.0.3