Less an indictment about Ghana's bilingual policy (we are bordered by francophone Togo to the east of Ghana and Cote d'Ivoire to the West)and more an excuse to reveal some information about the Accra-Tema motorway, I could only cull this from another source:
When the Accra-Tema Motorway was opened to traffic in 1964, it was mainly to link two major cities — Accra, the national capital, and Tema, the emerging industrial and port city.
At that time, Dr Kwame Nkrumah, the visionary, foresaw heavy vehicular traffic building between the two cities, reaching its peak when his dream of transforming Tema into the industrial hub of the newly-independent Ghana began to materialise.
Those who were old enough will recollect that in those days once one exited Accra, the only place of call was Tema, unless, of course, one was continuing towards Ho and beyond or Aflao, the country’s eastern gateway.
Today, 43 years later, the Accra-Tema Motorway cannot be said to be playing the same role envisaged at its inauguration.
The Motorway now carries heavy traffic destined for not only Tema and its numerous satellite settlements on the east but also for new communities that have sprung up on the western side...
It may interest you to know that the motorway is a few years younger than Britain's M1 motorway...