Agbani in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Agbani plotted against Enugu and Nigeria. The SNDi of new construction in Agbani peaked in 1991-2005, compared to Enugu which rose steadily and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Agbani's incremental SNDi fell from 7.82 to 5.63 between 1991-2005 and 2006-2020. In terms of the aggregate network, Agbani ranked 11th out of 11 cities in Enugu and 397th out of 422 in Nigeria as of 2020.

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

• Ghayl Ba Wazir, Yemen
• Ushirombo, Tanzania
• Didouche Mourad, Algeria
• Bikoro, Democratic Republic of the Congo
• Meti Chafi / Tilk u Meti, Ethiopia
• Daraw, Egypt

In new street additions, Agbani built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Ghayl Ba Wazir fluctuated in its street-construction patterns and Bikoro built increasingly disconnected streets over time. For the full network, Agbani grew more disconnected from 1975 through 1991-2005, then improved, while Ghayl Ba Wazir fluctuated in connectivity and Bikoro became progressively more disconnected. Notably, Agbani had a more connected network than Ghayl Ba Wazir in 1975 but the two have since reversed their relative ranking.