Obiaruku in context: Street-network sprawl trends

Obiaruku in context

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
ObiarukuDelta (Region)Nigeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Obiaruku plotted against Delta and Nigeria. The SNDi of new construction in Obiaruku rose steadily, compared to Delta which rose steadily and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Obiaruku's incremental SNDi rose from 3.37 to 3.65 between 1991-2005 and 2006-2020. In terms of the aggregate network, Obiaruku ranked 4th out of 20 cities in Delta and 199th out of 422 in Nigeria as of 2020.

New Street Additions (2006–2020)

SNDi value
3.65
Rank in Nigeria
158th of 422
Rank in Delta
3rd of 20

Entire Network (Aggregate)

SNDi value
3.1
Rank in Nigeria
199th of 422
Rank in Delta
4th of 20

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
ObiarukuUm el QusurAnkoro

In new street additions, Obiaruku built increasingly disconnected streets over time, while Um el Qusur built increasingly disconnected streets from 1975 through 1991-2005, then improved and Ankoro fluctuated in its street-construction patterns. For the full network, Obiaruku and Um el Qusur both became progressively more disconnected, while Ankoro fluctuated in connectivity. Notably, Obiaruku had a more sprawly network than Ankoro in 1975 but the two have since reversed their relative ranking.