 There are also high-income peripheral areas like Haatso, Kwabenya, Pokuase, Adenta, Taifa, Mallam, where development of engineering infrastructure is not yet complete.These areas developed ahead of infrastructure, however the Achimota-Ofankor controlled-access highway was scheduled to open in May 2012, dual carriageway road construction was also due to be completed in 2012.In total, 84.4% of all houses in the Accra Metropolitan Area have their outside walls made up of cement.