Rijau in context: Street-network sprawl trends

Rijau 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
RijauNiger (Region)Nigeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Rijau plotted against Niger and Nigeria. The SNDi of new construction in Rijau 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, Rijau's incremental SNDi rose from 2.8 to 3.15 between 1991-2005 and 2006-2020. In terms of the aggregate network, Rijau ranked 8th out of 13 cities in Niger and 148th out of 422 in Nigeria as of 2020.

New Street Additions (2006–2020)

SNDi value
3.15
Rank in Nigeria
121st of 422
Rank in Niger
7th of 13

Entire Network (Aggregate)

SNDi value
2.7
Rank in Nigeria
148th of 422
Rank in Niger
8th of 13

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
RijauPakenhamAbu Matarig

In new street additions, Rijau built increasingly disconnected streets over time, while Pakenham fluctuated in its street-construction patterns and Abu Matarig built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Rijau became progressively more disconnected, while Pakenham fluctuated in connectivity and Abu Matarig became progressively more connected. Rijau and Pakenham have been converging in their street-network character since 1975.