The following zoomable map is a scanned image of a 1967 map of Jamaica from Esso. The map provides a lot more detail -- roads, towns, villages and many small settlements in deep rural districts -- than what is shown on current online maps such as Google maps.
Click on the image to open another window on a desktop computer, then zoom in up to 10,000%. A quick reference table of distances between major towns in Jamaica is provided here.