Diepsloot in context: Street-network sprawl trends

Diepsloot 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
DiepslootGauteng (Region)South Africa (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Diepsloot plotted against Gauteng and South Africa. The SNDi of new construction in Diepsloot peaked in 1976-1990, compared to Gauteng which peaked in 1991-2005 and South Africa which rose steadily. Most recently, Diepsloot's incremental SNDi fell from 3.56 to 3.28 between 1991-2005 and 2006-2020. In terms of the aggregate network, Diepsloot ranked 8th out of 14 cities in Gauteng and 53rd out of 81 in South Africa as of 2020.

New Street Additions (2006–2020)

SNDi value
3.28
Rank in South Africa
27th of 81
Rank in Gauteng
3rd of 14

Entire Network (Aggregate)

SNDi value
3.52
Rank in South Africa
53rd of 81
Rank in Gauteng
8th of 14

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

What about similarly populated cities?

2.73.64.55.4<19751976–19901991–20052006–2020SNDi of street additions
2.73.64.55.4<19751976–19901991–20052006–2020SNDi of entire street network
DiepslootDundeeSlough

In new street additions, Diepsloot and Slough both built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Dundee built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Diepsloot and Slough both grew more disconnected from 1975 through 1991-2005, then improved, while Dundee became progressively more disconnected.