Tongliang in context: Street-network sprawl trends

Tongliang in context

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
TongliangChongqing (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tongliang plotted against Chongqing and China. The SNDi of new construction in Tongliang was at its lowest in 1991-2005, compared to Chongqing which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Tongliang's incremental SNDi rose from 2.18 to 2.53 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tongliang ranked 7th out of 47 cities in Chongqing and 462nd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.53
Rank in China
536th of 1843
Rank in Chongqing
8th of 47

Entire Network (Aggregate)

SNDi value
2.34
Rank in China
462nd of 1843
Rank in Chongqing
7th of 47

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

What about similarly populated cities?

1.21.82.43<19751976–19901991–20052006–2020SNDi of street additions
1.21.82.43<19751976–19901991–20052006–2020SNDi of entire street network
TongliangPingyiMachilipatnam

In new street additions, Tongliang built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns, while Pingyi fluctuated in its street-construction patterns and Machilipatnam built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Pingyi and Machilipatnam both became progressively more disconnected, while Tongliang became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Notably, Tongliang had a more sprawly network than Machilipatnam in 1975 but the two have since reversed their relative ranking.