Amassoma in context: Street-network sprawl trends

Amassoma in context

46810<19751976–19901991–20052006–2020SNDi of street additions
46810<19751976–19901991–20052006–2020SNDi of entire street network
AmassomaBayelsa (Region)Nigeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Amassoma plotted against Bayelsa and Nigeria. The SNDi of new construction in Amassoma rose steadily, compared to Bayelsa which followed a zig-zag trend with an overall increase and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Amassoma's incremental SNDi rose from 6.98 to 9.49 between 1991-2005 and 2006-2020. In terms of the aggregate network, Amassoma ranked 5th out of 6 cities in Bayelsa and 407th out of 422 in Nigeria as of 2020.

New Street Additions (2006–2020)

SNDi value
9.49
Rank in Nigeria
407th of 422
Rank in Bayelsa
5th of 6

Entire Network (Aggregate)

SNDi value
6.7
Rank in Nigeria
407th of 422
Rank in Bayelsa
5th of 6

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

What about similarly populated cities?

369<19751976–19901991–20052006–2020SNDi of street additions
369<19751976–19901991–20052006–2020SNDi of entire street network
AmassomaDongliangKabirwala

In new street additions, Amassoma and Kabirwala both built increasingly disconnected streets over time, while Dongliang fluctuated in its street-construction patterns. For the full network, Amassoma and Kabirwala both became progressively more disconnected, while Dongliang fluctuated in connectivity. Amassoma and Kabirwala have been growing further apart in their street-network character since 1975.