They did more back then... a lot of those locomotives like the ones in that vid (SD-40-2's) are all but gone nowdays.I grew up in the late '70s in Salt Lake where the UP ran. It's funny, that's just the way I thought all locomotives sounded.
They have a certain sound to them (turbo compressors)... it would be cool to have a song blend into that sound around the 2:38 mark and use a note in pitch that matches it at 2:55 starting a song...... just my wild imagination....
