Isa in context: Street-network sprawl trends

Isa 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
IsaSokoto (Region)Nigeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Isa plotted against Sokoto and Nigeria. The SNDi of new construction in Isa followed a zig-zag trend with an overall decrease, compared to Sokoto which peaked in 1976-1990 and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Isa's incremental SNDi fell from 3.33 to 1.53 between 1991-2005 and 2006-2020. In terms of the aggregate network, Isa ranked 4th out of 6 cities in Sokoto and 178th out of 422 in Nigeria as of 2020.

New Street Additions (2006–2020)

SNDi value
1.53
Rank in Nigeria
22nd of 422
Rank in Sokoto
2nd of 6

Entire Network (Aggregate)

SNDi value
2.91
Rank in Nigeria
178th of 422
Rank in Sokoto
4th 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
IsaBengkalisChampa

While Bengkalis and Champa both built increasingly disconnected streets over time, Isa fluctuated in its street-construction patterns in new street additions. Looking at the full network, Bengkalis and Champa both became progressively more disconnected, while Isa fluctuated in connectivity. Notably, Isa had a more sprawly network than Bengkalis in 1975 but the two have since reversed their relative ranking.