Ouled Djellal in context: Street-network sprawl trends

Ouled Djellal in context

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
Ouled DjellalBiskra (Region)Algeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ouled Djellal plotted against Biskra and Algeria. While Biskra and Algeria both followed a zig-zag trend with an overall decrease, Ouled Djellal's new street additions followed a zig-zag trend with an overall decrease. Most recently, Ouled Djellal's incremental SNDi rose from 1.26 to 1.5 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ouled Djellal ranked 3rd out of 4 cities in Biskra and 25th out of 109 in Algeria as of 2020.

New Street Additions (2006–2020)

SNDi value
1.5
Rank in Algeria
17th of 109
Rank in Biskra
2nd of 4

Entire Network (Aggregate)

SNDi value
1.53
Rank in Algeria
25th of 109
Rank in Biskra
3rd of 4

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
Ouled DjellalSon LaOmura

In new street additions, Ouled Djellal and Sơn La both fluctuated in its street-construction patterns, while Omura built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Ouled Djellal grew more disconnected from 1975 through 1976-1990, then improved, while Sơn La fluctuated in connectivity and Omura became progressively more disconnected. Ouled Djellal and Sơn La have been growing further apart in their street-network character since 1975.