Lenasia in context: Street-network sprawl trends

Lenasia in context

33.64.24.8<19751976–19901991–20052006–2020SNDi of street additions
33.64.24.8<19751976–19901991–20052006–2020SNDi of entire street network
LenasiaGauteng (Region)South Africa (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Lenasia plotted against Gauteng and South Africa. The SNDi of new construction in Lenasia was at its lowest in 1991-2005, compared to Gauteng which peaked in 1991-2005 and South Africa which rose steadily. Most recently, Lenasia's incremental SNDi rose from 3.25 to 3.43 between 1991-2005 and 2006-2020. In terms of the aggregate network, Lenasia ranked 10th out of 14 cities in Gauteng and 55th out of 81 in South Africa as of 2020.

New Street Additions (2006–2020)

SNDi value
3.43
Rank in South Africa
34th of 81
Rank in Gauteng
5th of 14

Entire Network (Aggregate)

SNDi value
3.59
Rank in South Africa
55th of 81
Rank in Gauteng
10th of 14

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

What about similarly populated cities?

34567<19751976–19901991–20052006–2020SNDi of street additions
34567<19751976–19901991–20052006–2020SNDi of entire street network
LenasiaHegarsariDusuq

In new street additions, Lenasia built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns, while Hegarsari fluctuated in its street-construction patterns and Dusuq built increasingly disconnected streets over time. Looking at the full network, Hegarsari and Dusuq both became progressively more disconnected, while Lenasia became progressively more connected. Lenasia and Hegarsari have been growing further apart in their street-network character since 1975.