Wonderful chart this, almost worthy of Edward Tufte. Arrows show whether a country drives on the right or left, size of arrow relates to miles driven (I think). Note the double coloured arrow for Somalia - Somalia drives on the right, but independent Somaliland drives on the left! Also note that the left (red) driving countries map pretty well onto the old British Empire, exceptions being Canada (on right), and Japan (on left).
***Imported from old blog***