Tamanrasset in context: Street-network sprawl trends

Tamanrasset 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
TamanrassetTamanghasset (Region)Algeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tamanrasset plotted against Tamanghasset and Algeria. The SNDi of new construction in Tamanrasset was at its lowest in 1976-1990, compared to Tamanghasset which peaked in 1976-1990 and Algeria which followed a zig-zag trend with an overall decrease. Most recently, Tamanrasset's incremental SNDi rose from 1.75 to 1.81 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tamanrasset ranked 1st out of 1 cities in Tamanghasset and 36th out of 109 in Algeria as of 2020.

New Street Additions (2006–2020)

SNDi value
1.81
Rank in Algeria
32nd of 109
Rank in Tamanghasset
1st of 1

Entire Network (Aggregate)

SNDi value
1.78
Rank in Algeria
36th of 109
Rank in Tamanghasset
1st of 1

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

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
TamanrassetApatzinganJebel Aulia

In new street additions, Tamanrasset built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Apatzingán built increasingly disconnected streets over time and Jebel Aulia built increasingly disconnected streets from 1975 through 1976-1990, then improved. Looking at the full network, Apatzingán and Jebel Aulia both became progressively more disconnected, while Tamanrasset became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Notably, Tamanrasset had a more sprawly network than Apatzingán in 1975 but the two have since reversed their relative ranking.