Saraf `Umrah in context: Street-network sprawl trends

Saraf `Umrah in context

1.21.51.82.1<19751976–19901991–20052006–2020SNDi of street additions
1.21.51.82.1<19751976–19901991–20052006–2020SNDi of entire street network
Saraf `UmrahNorth Darfur (Region)Sudan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Saraf `Umrah plotted against North Darfur and Sudan. The SNDi of new construction in Saraf `Umrah was at its lowest in 1976-1990, compared to North Darfur which was at its lowest in 1991-2005 and Sudan which followed a zig-zag trend with an overall increase. Most recently, Saraf `Umrah's incremental SNDi rose from 2.02 to 2.23 between 1991-2005 and 2006-2020. In terms of the aggregate network, Saraf `Umrah ranked 7th out of 9 cities in North Darfur and 55th out of 78 in Sudan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.23
Rank in Sudan
54th of 78
Rank in North Darfur
7th of 9

Entire Network (Aggregate)

SNDi value
1.89
Rank in Sudan
55th of 78
Rank in North Darfur
7th of 9

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

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
Saraf `UmrahWuxueGangcheng

In new street additions, Saraf `Umrah built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Wuxue fluctuated in its street-construction patterns and Gangcheng fluctuated in its street-construction patterns. For the full network, Saraf `Umrah became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Wuxue became progressively more connected and Gangcheng became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Saraf `Umrah and Gangcheng have been converging in their street-network character since 1975.