In response to the public's growing interest in automobiles, Pontiac offered guided tours of some of its plants in the early 1950s. The narrated tour of Pontiac East Assembly included a trip down the final assembly line on an electric tram.

https://gmphotostore.com/1950s-pontiac-east-assembly-plant-poster/

https://www.flickr.com/photos/iisg/4586690750/in/album-72157622841573224/