A fairly frequent topic here has been reports of hearing GL on radio across the States
I have just been amazed yes startled actually whilst checking out "links" to a youtube video to discover:-
http://www.yes.com
a site headed
"Find songs that have played within the past 7 days on the nation's top 2,600 radio stations, CMT, FUSE, MTV, and VH-1. Rate currently playing songs right now to influence charts & chat with other listeners."
where if you search for GL in the box alongside the YES this page opens
http://yes.com/artist/Gordon%20Lightfoot
"Artist View
These are the stations that recently played songs by Gordon Lightfoot. The list is updated in real time so you will see stations as they air Gordon Lightfoot's songs"
And you get a list showing which GL songs have recently like today even been played on US radio stations you will get a
page headed
Gordon Lightfoot history
Playback history and ranks from across the nation
which currently shows that Sundown has been played no less than 8 times today already on radio stations like
WROR Boston WSRV Atlanta,KSNE Las Vegas
Fascinating stuff!!!