the new rates for public passenger vehicles are on the transport authority website. http://www.ta.org.jm/content/route-taxi-fares
It is noteworthy that the new fare from treasure beach to black river is $205

Are you sure it is not $250 instead of $205?

on the transport authority page it says, From Pedro cross TO Black River...$220 ,Treasure Beach to Black River $205. Cross Road to Black RIVER $260

for clarification.pedro cross is what we refer to as crossroads ,and on the transport authority,s map cross roads is up by kinkeads plaza at southfield.