Zeralda in context: Street-network sprawl trends

Zeralda in context

2.83.54.24.9<19751976–19901991–20052006–2020SNDi of street additions
2.83.54.24.9<19751976–19901991–20052006–2020SNDi of entire street network
ZeraldaAlger (Region)Algeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Zeralda plotted against Alger and Algeria. The SNDi of new construction in Zeralda peaked in 1991-2005, compared to Alger which rose steadily and Algeria which followed a zig-zag trend with an overall decrease. Most recently, Zeralda's incremental SNDi fell from 4.67 to 3.55 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zeralda ranked 1st out of 3 cities in Alger and 90th out of 109 in Algeria as of 2020.

New Street Additions (2006–2020)

SNDi value
3.55
Rank in Algeria
81st of 109
Rank in Alger
1st of 3

Entire Network (Aggregate)

SNDi value
3.99
Rank in Algeria
90th of 109
Rank in Alger
1st of 3

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
ZeraldaMalumfashiKpalime

In new street additions, Zeralda built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Malumfashi fluctuated in its street-construction patterns and Kpalimé built increasingly disconnected streets over time. For the full network, Zeralda grew more disconnected from 1975 through 1991-2005, then improved, while Malumfashi fluctuated in connectivity and Kpalimé became progressively more disconnected.