Rob, great picture of the "Old Road" although I can't remember exactly where that spot is and I have never heard it referred to as "Ganja Bridge" I think it might have been a location used in the Bond movie "Live and Let Die" filmed in many parts of JA. I guess the crocodile factory scene was shot at Ross Kananga's Jamaica Swamp Safari in Falmouth but there were numerous "Shoots" shot on the "Old Road" from MoBay to Negril specifically the double decker bus chase.

https://www.youtube.com/watch?v=IuDAx4Yndv0

You probably know the facts better than I do but in any case the "Old Road" was / is very cool!!