Ibillo in context: Street-network sprawl trends

Ibillo in context

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
IbilloEdo (Region)Nigeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ibillo plotted against Edo and Nigeria. The SNDi of new construction in Ibillo rose steadily, compared to Edo which rose steadily and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Ibillo's incremental SNDi rose from 2.56 to 4.33 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ibillo ranked 2nd out of 12 cities in Edo and 92nd out of 422 in Nigeria as of 2020.

New Street Additions (2006–2020)

SNDi value
4.33
Rank in Nigeria
218th of 422
Rank in Edo
6th of 12

Entire Network (Aggregate)

SNDi value
2.18
Rank in Nigeria
92nd of 422
Rank in Edo
2nd of 12

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

What about similarly populated cities?

246810<19751976–19901991–20052006–2020SNDi of street additions
246810<19751976–19901991–20052006–2020SNDi of entire street network
IbilloDushanziAbhom

In new street additions, Ibillo built increasingly disconnected streets over time, while Dushanzi built increasingly disconnected streets from 1975 through 1976-1990, then improved and Abhom built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Ibillo became progressively more disconnected, while Dushanzi grew more disconnected from 1975 through 1976-1990, then improved and Abhom became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Notably, Ibillo had a more connected network than Dushanzi in 1975 but the two have since reversed their relative ranking.