Zalingei in context: Street-network sprawl trends

Zalingei in context

1.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
ZalingeiCentral Darfur (Region)Sudan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Zalingei plotted against Central Darfur and Sudan. The SNDi of new construction in Zalingei peaked in 1976-1990, compared to Central Darfur which rose steadily and Sudan which followed a zig-zag trend with an overall increase. Most recently, Zalingei's incremental SNDi fell from 2.79 to 2.63 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zalingei ranked 2nd out of 2 cities in Central Darfur and 64th out of 78 in Sudan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.63
Rank in Sudan
63rd of 78
Rank in Central Darfur
2nd of 2

Entire Network (Aggregate)

SNDi value
2.35
Rank in Sudan
64th of 78
Rank in Central Darfur
2nd of 2

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

What about similarly populated cities?

0369<19751976–19901991–20052006–2020SNDi of street additions
0369<19751976–19901991–20052006–2020SNDi of entire street network
ZalingeiKumtaKeriya

In new street additions, Zalingei built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Kumta built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Keriya fluctuated in its street-construction patterns. For the full network, Zalingei became progressively more disconnected, while Kumta became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards and Keriya fluctuated in connectivity. Zalingei and Keriya have been growing further apart in their street-network character since 1975.