Tangyin in context: Street-network sprawl trends

Tangyin in context

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
TangyinHenan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tangyin plotted against Henan and China. The SNDi of new construction in Tangyin peaked in 1991-2005, compared to Henan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Tangyin's incremental SNDi fell from 2.52 to 2.05 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tangyin ranked 46th out of 129 cities in Henan and 320th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.05
Rank in China
275th of 1843
Rank in Henan
32nd of 129

Entire Network (Aggregate)

SNDi value
2.16
Rank in China
320th of 1843
Rank in Henan
46th of 129

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

What about similarly populated cities?

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
TangyinJilibAbraka

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