Phase Three consists of the growth of feeder routes and the beginnings of lateral interconnection (Figure 3.23C). The development of feeder routes i accompanied continued growth of the main seacoast terminals in a spiral of by trade and expansion. Intermediate centres grow up between the capture coastal and interior terminals. Taaffe, Morrill and Gould (1963, pp. 511-14) show a series of maps of road development in Ghana and Nigeria in the period since 1920 the lateral connections of earlier disconnected lines of to suggest penetration and exploitation