Shiroro in context: Street-network sprawl trends

Shiroro in context

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
ShiroroNiger (Region)Nigeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Shiroro plotted against Niger and Nigeria. The SNDi of new construction in Shiroro rose steadily, compared to Niger which followed a zig-zag trend with an overall increase and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Shiroro's incremental SNDi rose from 2.49 to 3.87 between 1991-2005 and 2006-2020. In terms of the aggregate network, Shiroro ranked 9th out of 13 cities in Niger and 166th out of 422 in Nigeria as of 2020.

New Street Additions (2006–2020)

SNDi value
3.87
Rank in Nigeria
177th of 422
Rank in Niger
11th of 13

Entire Network (Aggregate)

SNDi value
2.83
Rank in Nigeria
166th of 422
Rank in Niger
9th of 13

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

What about similarly populated cities?

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
ShiroroReigateAltay

In new street additions, Shiroro built increasingly disconnected streets over time, while Reigate built increasingly disconnected streets from 1975 through 1991-2005, then improved and Altay fluctuated in its street-construction patterns. For the full network, Shiroro and Reigate both became progressively more disconnected, while Altay became progressively more connected. Shiroro and Reigate have been converging in their street-network character since 1975.