Final answer:
In 1970, Amtrak started the revamp of its passenger fleet at the Beech Grove facility; this effort was in line with Amtrak's role in sustaining passenger rail service after its formation by the government due to decreased rail travel.
Step-by-step explanation:
In 1970, Amtrak began rebuilding the best of its passenger fleet cars at the Amtrak Beech Grove maintenance facility. d) 1970, passenger, Beech Grove.
Amtrak was formed as a government response to the decline in passenger rail travel during the 1950s and 1960s as automobiles became the dominant mode of transportation. With a mandate to maintain passenger rail service, Amtrak consolidated the remnants of various rail companies. The Beech Grove facility became a critical center for refurbishing and maintaining Amtrak's fleet. Originally established for the maintenance of steam locomotives in the early 20th century, the Beech Grove shops evolved along with the industry trends, focusing on Amtrak's passenger cars in the latter part of the century. These refurbishments not only enhanced the quality and reliability but also were crucial in aiming to attract more travelers back to rail as an efficient means of transportation.