Mount Annan in context: Street-network sprawl trends

Mount Annan in context

2.83.54.24.9<19751976–19901991–20052006–2020SNDi of street additions
2.83.54.24.9<19751976–19901991–20052006–2020SNDi of entire street network
Mount AnnanNew South Wales (Region)Australia (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Mount Annan plotted against New South Wales and Australia. The SNDi of new construction in Mount Annan followed a zig-zag trend with an overall decrease, compared to New South Wales which peaked in 1991-2005 and Australia which peaked in 1991-2005. Most recently, Mount Annan's incremental SNDi fell from 3.81 to 3.18 between 1991-2005 and 2006-2020. In terms of the aggregate network, Mount Annan ranked 4th out of 6 cities in New South Wales and 20th out of 35 in Australia as of 2020.

New Street Additions (2006–2020)

SNDi value
3.18
Rank in Australia
12th of 35
Rank in New South Wales
1st of 6

Entire Network (Aggregate)

SNDi value
3.7
Rank in Australia
20th of 35
Rank in New South Wales
4th of 6

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

What about similarly populated cities?

51015<19751976–19901991–20052006–2020SNDi of street additions
51015<19751976–19901991–20052006–2020SNDi of entire street network
Mount AnnanXiangshanAsadabad

In new street additions, Mount Annan fluctuated in its street-construction patterns, while Xiangshan built increasingly connected streets over time and Asadabad built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Mount Annan and Xiangshan both became progressively more connected, while Asadabad became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Mount Annan and Xiangshan have been growing further apart in their street-network character since 1975.