The efforts to unite Africa should start with free travel before we think of trade.
I am yet to understand what happened to the single passport but from what I hear, countries are hesitant to take this step because of selfish interests.
Why would an African need a visa to access another African country? What are African leaders discussing at the AU annually?
I am not sure how regional blocks are working except for East Africa where all you need is a national identity card to cross borders.
When we sort free movement, we can then look at free trade then jobs.