Biliri in context: Street-network sprawl trends

Biliri in context

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
BiliriGombe (Region)Nigeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Biliri plotted against Gombe and Nigeria. The SNDi of new construction in Biliri rose steadily, compared to Gombe which followed a zig-zag trend with an overall increase and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Biliri's incremental SNDi rose from 3.18 to 5.49 between 1991-2005 and 2006-2020. In terms of the aggregate network, Biliri ranked 5th out of 8 cities in Gombe and 117th out of 422 in Nigeria as of 2020.

New Street Additions (2006–2020)

SNDi value
5.49
Rank in Nigeria
314th of 422
Rank in Gombe
6th of 8

Entire Network (Aggregate)

SNDi value
2.43
Rank in Nigeria
117th of 422
Rank in Gombe
5th of 8

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
BiliriGirzaWaled

In new street additions, Biliri and Waled both built increasingly disconnected streets over time, while Girza fluctuated in its street-construction patterns. For the full network, Biliri and Waled both became progressively more disconnected, while Girza became progressively more connected. Biliri and Girza have been converging in their street-network character since 1975.