Gaya in context: Street-network sprawl trends

Gaya in context

1.522.53<19751976–19901991–20052006–2020SNDi of street additions
1.522.53<19751976–19901991–20052006–2020SNDi of entire street network
GayaDosso (Region)Niger (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Gaya plotted against Dosso and Niger. The SNDi of new construction in Gaya 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, Gaya's incremental SNDi rose from 2.0 to 2.91 between 1991-2005 and 2006-2020. In terms of the aggregate network, Gaya ranked 3rd out of 3 cities in Dosso and 25th out of 33 in Niger as of 2020.

New Street Additions (2006–2020)

SNDi value
2.91
Rank in Niger
20th of 33
Rank in Dosso
3rd of 3

Entire Network (Aggregate)

SNDi value
2.09
Rank in Niger
25th of 33
Rank in Dosso
3rd of 3

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
GayaLianzhouChilmari

In new street additions, Gaya built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Lianzhou fluctuated in its street-construction patterns and Chilmari built increasingly disconnected streets over time. For the full network, Gaya became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Lianzhou fluctuated in connectivity and Chilmari became progressively more disconnected. Gaya and Chilmari have been growing further apart in their street-network character since 1975.