Geelong in context: Street-network sprawl trends

Geelong in context

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
GeelongVictoria (Region)Australia (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Geelong plotted against Victoria and Australia. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Geelong's incremental SNDi fell from 5.42 to 4.43 between 1991-2005 and 2006-2020. In terms of the aggregate network, Geelong ranked 4th out of 7 cities in Victoria and 11th out of 35 in Australia as of 2020.

New Street Additions (2006–2020)

SNDi value
4.43
Rank in Australia
28th of 35
Rank in Victoria
7th of 7

Entire Network (Aggregate)

SNDi value
3.2
Rank in Australia
11th of 35
Rank in Victoria
4th of 7

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
GeelongGuoyangRawang

In new street additions, Geelong and Guoyang both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Rawang fluctuated in its street-construction patterns. For the full network, Geelong and Rawang both became progressively more disconnected, while Guoyang grew more disconnected from 1975 through 1991-2005, then improved. Geelong and Rawang have been growing further apart in their street-network character since 1975.