Context
The chart above shows the evolution of street network disconnectedness of the most connected and most disconnected cities in Nigeria, for both new street additions (left) and the aggregate street network (right).
Nigeria in context: Street-network sprawl of new development
The level of street-network sprawl in new development in Nigeria followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Nigeria, we can consider three of its most populous regions: Lagos, Oyo and Rivers. Out of the three regions, Rivers does not follow the same trend as the country. The level of street-network sprawl in new development in Rivers rose steadily.
How do development practices in Nigeria fare in comparison to others in the world? Most recently in 2006-2020, street construction in Nigeria was the 100th-most disconnected out of the 179 countries in the world. Its position in the ranks since 1975 has risen; relative to other countries in the world, street construction in Nigeria has become more disconnected. Nigeria ranked 110th in 1975, 90th in 1976-1990, 83rd in 1991-2005 and 100th in 2006-2020.
The largest city in Nigeria is Lagos, with a population of 10762900 people. Taking into account the entire (i.e. aggregate) street network in Lagos as of 2020, the overall level of street-network sprawl is 4.9, which is very sprawly. The level of street-network sprawl in new development in Lagos followed a zig-zag trend with an overall increase.
Nigeria in context: Aggregate street-network sprawl
As of 2020, the city with the most disconnected street network in Nigeria is Ugborodo with an SNDi of 13.87, which is very sprawly. Conversely, the most connected city is Bena with an SNDi of 0.65, which is very well-connected. See these two cities’ trends in the above graph, or dive deeper into each: Bena, Ugborodo.
The level of street-network sprawl in the aggregate network in Nigeria rose steadily. To get a sense of how the aggregate street network has changed in Nigeria, we can consider three of its most populous regions: Lagos, Oyo and Rivers. Disconnectivity in the most populous cities in Nigeria follow the same country trend.
To date, Nigeria is the 113th-most disconnected out of the 179 countries in the world. Its position in the ranks since 1975 has fallen; relative to other countries in the world, the street network in Nigeria has become more connected. Nigeria ranked 110th in 1975, 104th in 1976-1990, 99th in 1991-2005 and 113th in 2006-2020.
The largest city in Nigeria is Lagos, with a population of 10762900 people. Taking into account the entire (i.e. aggregate) street network in Lagos as of 2020, the overall level of street-network sprawl is 4.9, which is very sprawly. The level of street-network sprawl in the aggregate network in Lagos rose steadily.