Sig in context: Street-network sprawl trends

Sig 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
SigMascara (Region)Algeria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Sig plotted against Mascara and Algeria. The SNDi of new construction in Sig peaked in 1976-1990, compared to Mascara which followed a zig-zag trend with an overall increase and Algeria which followed a zig-zag trend with an overall decrease. Most recently, Sig's incremental SNDi fell from 1.86 to 1.78 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sig ranked 1st out of 3 cities in Mascara and 35th out of 109 in Algeria as of 2020.

New Street Additions (2006–2020)

SNDi value
1.78
Rank in Algeria
31st of 109
Rank in Mascara
1st of 3

Entire Network (Aggregate)

SNDi value
1.72
Rank in Algeria
35th of 109
Rank in Mascara
1st of 3

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

What about similarly populated cities?

1.21.82.43<19751976–19901991–20052006–2020SNDi of street additions
1.21.82.43<19751976–19901991–20052006–2020SNDi of entire street network
SigShizongRajampet

In new street additions, Sig built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Shizong built increasingly disconnected streets from 1975 through 1991-2005, then improved and Rajampet fluctuated in its street-construction patterns. For the full network, Sig became progressively more disconnected, while Shizong grew more disconnected from 1975 through 1991-2005, then improved and Rajampet fluctuated in connectivity. Notably, Sig had a more sprawly network than Shizong in 1975 but the two have since reversed their relative ranking.