In spite of honouring the thread title, I shall note until very recently in my town (La Plata) some of the traffic lights were the original German Siemens ones from the WW2. They were part of the spoils of war Argentina got after declaring war on Zee Germanz once they were defeated.
Some of the Nazi generals such as Erich Priebke ended up hiding here shortly after, but that's a story for a different time.
Erich Priebke - Wikipedia
en.wikipedia.org