The Proposed 4th Mainland Bridge Lagos, Nigeria


The Proposed 4th mainland bridge will be the missing link completing a transport ring around the city, connecting Ikorodu with the community of Ajah/Lekki, and facilitating the rapid expansion of the eastern corridor of the city. 

In addition to the bridge, the govt propose a city centre – a new heart – built on a new artificial island in the lagoon to relieve pressure on Lagos Island, the existing city centre. The 4th mainland bridge will deliver people and traffic across the city and into a 2.5km x 0.8km new urban core for Lagos.

The bridge will not only function as a means to distribute vehicular traffic more evenly and connect the new island to the rest of the city; it will stimulate and accommodate pedestrian life – the natural way of life in Lagos, with its tropical environment and intimate, street level exchanges.

While vehicle traffic flows on the bridge's upper deck (which includes lanes for BRT buses), the lower deck facilitates the inevitable hustle and bustle of Lagos in a more conducive environment. Markets, kiosks, shops, bars, and restaurants will generate a new area of pedestrian convergence, fostering economic growth, social life, culture and interaction. Where the bridge meets the land, 'nodes' will act as urban condensors, attracting people to the trading areas, and allowing transfer from one means of transport to another: the lower deck of the bridge will also accommodate a light rail system, providing a secondary means of transportation on the pedestrian level.

More than a decade of research on Lagos with local collaborators led us to realize the city's ingenuity in using and redefining the advanced infrastructure built in the 1970s: the massive cloverleaf interchanges on Lagos’s highways function more as focal points for trade, interaction and shelter than as smooth traffic delivery systems. An infrastructural project on the scale of the 4th mainland bridge – 1.5km long – will perform best by anticipating such inevitable additional uses and encoding them into the structure itself.

Source: Nigeria Infrastructure Devt

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