Centurion in context: Street-network sprawl trends

Centurion in context

345678<19751976–19901991–20052006–2020SNDi of street additions
345678<19751976–19901991–20052006–2020SNDi of entire street network
CenturionGauteng (Region)South Africa (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Centurion plotted against Gauteng and South Africa. The SNDi of new construction in Centurion peaked in 1991-2005, compared to Gauteng which peaked in 1991-2005 and South Africa which rose steadily. Most recently, Centurion's incremental SNDi fell from 7.78 to 7.78 between 1991-2005 and 2006-2020. In terms of the aggregate network, Centurion ranked 14th out of 14 cities in Gauteng and 81st out of 81 in South Africa as of 2020.

New Street Additions (2006–2020)

SNDi value
7.78
Rank in South Africa
79th of 81
Rank in Gauteng
14th of 14

Entire Network (Aggregate)

SNDi value
6.63
Rank in South Africa
81st of 81
Rank in Gauteng
14th of 14

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
CenturionKarurUlanqab

In new street additions, Centurion built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Karur built increasingly disconnected streets over time and Ulanqab built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Centurion and Karur both became progressively more disconnected, while Ulanqab grew more disconnected from 1975 through 1976-1990, then improved. Centurion and Karur have been growing further apart in their street-network character since 1975.