Guerrara in context: Street-network sprawl trends

Guerrara in context

1.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
GuerraraGhardaia (Region)Algeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Guerrara plotted against Ghardaïa and Algeria. The SNDi of new construction in Guerrara was at its lowest in 1991-2005, compared to Ghardaïa which fell steadily and Algeria which followed a zig-zag trend with an overall decrease. Most recently, Guerrara's incremental SNDi rose from 1.58 to 1.64 between 1991-2005 and 2006-2020. In terms of the aggregate network, Guerrara ranked 1st out of 3 cities in Ghardaïa and 40th out of 109 in Algeria as of 2020.

New Street Additions (2006–2020)

SNDi value
1.64
Rank in Algeria
24th of 109
Rank in Ghardaïa
1st of 3

Entire Network (Aggregate)

SNDi value
1.85
Rank in Algeria
40th of 109
Rank in Ghardaïa
1st of 3

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

What about similarly populated cities?

4812<19751976–19901991–20052006–2020SNDi of street additions
4812<19751976–19901991–20052006–2020SNDi of entire street network
GuerraraKakinaHengshan

While Kakina and Hengshan both fluctuated in its street-construction patterns, Guerrara built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns in new street additions. Looking at the full network, Kakina and Hengshan both fluctuated in connectivity, while Guerrara became progressively more connected. Notably, Guerrara had a more sprawly network than Hengshan in 1975 but the two have since reversed their relative ranking.