Er Roseires in context: Street-network sprawl trends

Er Roseires in context

1.522.533.5<19751976–19901991–20052006–2020SNDi of street additions
1.522.533.5<19751976–19901991–20052006–2020SNDi of entire street network
Er RoseiresBlue Nile (Region)Sudan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Er Roseires plotted against Blue Nile and Sudan. The SNDi of new construction in Er Roseires fell steadily, compared to Blue Nile which was at its lowest in 1991-2005 and Sudan which followed a zig-zag trend with an overall increase. Most recently, Er Roseires's incremental SNDi fell from 3.07 to 1.66 between 1991-2005 and 2006-2020. In terms of the aggregate network, Er Roseires ranked 3rd out of 3 cities in Blue Nile and 69th out of 78 in Sudan as of 2020.

New Street Additions (2006–2020)

SNDi value
1.66
Rank in Sudan
35th of 78
Rank in Blue Nile
2nd of 3

Entire Network (Aggregate)

SNDi value
2.97
Rank in Sudan
69th of 78
Rank in Blue Nile
3rd of 3

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

What about similarly populated cities?

1.42.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
1.42.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
Er RoseiresKollegalLiaozhong

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