Hassi El Garra in context: Street-network sprawl trends

Hassi El Garra in context

22.533.5<19751976–19901991–20052006–2020SNDi of street additions
22.533.5<19751976–19901991–20052006–2020SNDi of entire street network
Hassi El GarraGhardaia (Region)Algeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Hassi El Garra plotted against Ghardaïa and Algeria. The SNDi of new construction in Hassi El Garra fell steadily, compared to Ghardaïa which fell steadily and Algeria which followed a zig-zag trend with an overall decrease. Most recently, Hassi El Garra's incremental SNDi fell from 2.22 to 1.95 between 1991-2005 and 2006-2020. In terms of the aggregate network, Hassi El Garra ranked 2nd out of 3 cities in Ghardaïa and 71st out of 109 in Algeria as of 2020.

New Street Additions (2006–2020)

SNDi value
1.95
Rank in Algeria
37th of 109
Rank in Ghardaïa
2nd of 3

Entire Network (Aggregate)

SNDi value
2.54
Rank in Algeria
71st of 109
Rank in Ghardaïa
2nd 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
Hassi El GarraBalarampurSilivri

In new street additions, Hassi El Garra built increasingly connected streets over time, while Balarampur built increasingly disconnected streets over time and Silivri fluctuated in its street-construction patterns. Looking at the full network, Balarampur and Silivri both became progressively more disconnected, while Hassi El Garra became progressively more connected. Notably, Hassi El Garra had a more sprawly network than Balarampur in 1975 but the two have since reversed their relative ranking.