Arzew in context: Street-network sprawl trends

Arzew in context

22.42.83.2<19751976–19901991–20052006–2020SNDi of street additions
22.42.83.2<19751976–19901991–20052006–2020SNDi of entire street network
ArzewOran (Region)Algeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Arzew plotted against Oran and Algeria. The SNDi of new construction in Arzew peaked in 1976-1990, compared to Oran which followed a zig-zag trend with an overall increase and Algeria which followed a zig-zag trend with an overall decrease. Most recently, Arzew's incremental SNDi fell from 2.5 to 2.33 between 1991-2005 and 2006-2020. In terms of the aggregate network, Arzew ranked 4th out of 4 cities in Oran and 70th out of 109 in Algeria as of 2020.

New Street Additions (2006–2020)

SNDi value
2.33
Rank in Algeria
55th of 109
Rank in Oran
1st of 4

Entire Network (Aggregate)

SNDi value
2.52
Rank in Algeria
70th of 109
Rank in Oran
4th of 4

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
ArzewNavapurHuacheng

In new street additions, Arzew built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Navapur built increasingly disconnected streets from 1975 through 1991-2005, then improved and Huacheng built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Arzew grew more disconnected from 1975 through 1976-1990, then improved, while Navapur grew more disconnected from 1975 through 1991-2005, then improved and Huacheng became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Arzew and Navapur have been converging in their street-network character since 1975.