Asaba in context: Street-network sprawl trends

Asaba in context

3.544.55<19751976–19901991–20052006–2020SNDi of street additions
3.544.55<19751976–19901991–20052006–2020SNDi of entire street network
AsabaDelta (Region)Nigeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Asaba plotted against Delta and Nigeria. The SNDi of new construction in Asaba peaked in 1991-2005, compared to Delta which rose steadily and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Asaba's incremental SNDi fell from 3.5 to 3.23 between 1991-2005 and 2006-2020. In terms of the aggregate network, Asaba ranked 5th out of 20 cities in Delta and 220th out of 422 in Nigeria as of 2020.

New Street Additions (2006–2020)

SNDi value
3.23
Rank in Nigeria
126th of 422
Rank in Delta
1st of 20

Entire Network (Aggregate)

SNDi value
3.3
Rank in Nigeria
220th of 422
Rank in Delta
5th of 20

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

What about similarly populated cities?

3456<19751976–19901991–20052006–2020SNDi of street additions
3456<19751976–19901991–20052006–2020SNDi of entire street network
AsabaGbokoBengkulu

While Gboko and Bengkulu both built increasingly disconnected streets over time, Asaba built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. Looking at the full network, Gboko and Bengkulu both became progressively more disconnected, while Asaba grew more disconnected from 1975 through 1991-2005, then improved. Asaba and Gboko have been converging in their street-network character since 1975.