The current ad is for Norfolk Southern Railroad. In the first place, I don't think I've ever seen an advertisement for a railroad. Well, maybe I do remember one for Amtrak. The music is a take-off of "Conjunction Junction" that was part of ABC's "School House Rock" when my boys were young. "Conjunction Junction" is quite a catchy little ditty; the only problem is that it gets stuck in my head playing in "repeat" mode for days at a time.
If I ever need a train to haul freight, I would call Norfolk Southern just because I like their commercial. Have a listen: