Oleh in context: Street-network sprawl trends

Oleh in context

3.244.85.6<19751976–19901991–20052006–2020SNDi of street additions
3.244.85.6<19751976–19901991–20052006–2020SNDi of entire street network
OlehDelta (Region)Nigeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Oleh plotted against Delta and Nigeria. The SNDi of new construction in Oleh rose steadily, compared to Delta which rose steadily and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Oleh's incremental SNDi rose from 4.44 to 5.43 between 1991-2005 and 2006-2020. In terms of the aggregate network, Oleh ranked 10th out of 20 cities in Delta and 291st out of 422 in Nigeria as of 2020.

New Street Additions (2006–2020)

SNDi value
5.43
Rank in Nigeria
309th of 422
Rank in Delta
12th of 20

Entire Network (Aggregate)

SNDi value
3.79
Rank in Nigeria
291st of 422
Rank in Delta
10th of 20

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

What about similarly populated cities?

2.73.64.55.4<19751976–19901991–20052006–2020SNDi of street additions
2.73.64.55.4<19751976–19901991–20052006–2020SNDi of entire street network
OlehAgriValdivia

In new street additions, Oleh built increasingly disconnected streets over time, while Ağrı built increasingly disconnected streets from 1975 through 1991-2005, then improved and Valdivia fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Oleh and Valdivia have been growing further apart in their street-network character since 1975.