Hmmmmmmm, see attached map, B8 runs A2 Ferris Cross (just east of Sav) to A1 Reading (just west of MoBay)
Border is the border of St James & Westmoreland between Mackfield & Chichester - if you are headed north and hit the orange groves you went to far, if you are headed south hang your head out the window at the orange groves and turn your sniffer on.
http://www.jamaicancaves.org/jamaica-road-map.htm





