Dogondoutchi in context: Street-network sprawl trends

Dogondoutchi in context

0.61.21.82.43<19751976–19901991–20052006–2020SNDi of street additions
0.61.21.82.43<19751976–19901991–20052006–2020SNDi of entire street network
DogondoutchiDosso (Region)Niger (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Dogondoutchi plotted against Dosso and Niger. The SNDi of new construction in Dogondoutchi was at its lowest in 1976-1990, compared to Dosso which followed a zig-zag trend with an overall increase and Niger which rose steadily. Most recently, Dogondoutchi's incremental SNDi rose from 1.07 to 2.01 between 1991-2005 and 2006-2020. In terms of the aggregate network, Dogondoutchi ranked 1st out of 3 cities in Dosso and 14th out of 33 in Niger as of 2020.

New Street Additions (2006–2020)

SNDi value
2.01
Rank in Niger
13th of 33
Rank in Dosso
1st of 3

Entire Network (Aggregate)

SNDi value
1.5
Rank in Niger
14th of 33
Rank in Dosso
1st of 3

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

What about similarly populated cities?

02468<19751976–19901991–20052006–2020SNDi of street additions
02468<19751976–19901991–20052006–2020SNDi of entire street network
DogondoutchiHaurgeulisBan Phaeo

In new street additions, Dogondoutchi built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Haurgeulis built increasingly disconnected streets over time and Ban Phaeo built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Dogondoutchi became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Haurgeulis became progressively more disconnected and Ban Phaeo became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards.