Most of the time, we talk about a "transition era" in the context of steam to diesel conversions. In this case, though, I ran into some films on the transition from trolleys to buses. Now, I wish we had the trolleys back, and think the GM film that opens this set says some things and ignores others, but you still have a look at Philadelphia in the 1950s, and that makes it worthwhile here:

http://www.youtube.com/watch?v=29i_DTIE ... re=related

Here, in three parts, is a Los Angeles training film for trolley and bus operators from 1947:

http://www.youtube.com/watch?feature=en ... NRA5LAVVD0

http://www.youtube.com/watch?v=4cZymOIG ... ure=relmfu

http://www.youtube.com/watch?v=OH0gF7v1 ... ure=relmfu

Finally, a commercial film, from Interurban Films, on the last operations of Pacific Electric. Normally this wouldn't be something to post here, but I'm not sure this is still available. If it is, let us know!

http://www.youtube.com/watch?v=ebboO52I ... re=related

Enjoy the weekend.

Edit: Closing scene from a late 1950s movie, "Hell Bound" (1957), featuring the famous pile of LARy cars that were being scrapped.

http://www.youtube.com/watch?v=JX90KwM6 ... re=related

http://www.imdb.com/title/tt0050495/

Have fun.