Huaxian in context: Street-network sprawl trends

Huaxian in context

2.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
2.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
HuaxianHenan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Huaxian plotted against Henan and China. The SNDi of new construction in Huaxian fell steadily, compared to Henan which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Huaxian's incremental SNDi fell from 2.61 to 2.6 between 1991-2005 and 2006-2020. In terms of the aggregate network, Huaxian ranked 90th out of 129 cities in Henan and 917th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.6
Rank in China
592nd of 1843
Rank in Henan
73rd of 129

Entire Network (Aggregate)

SNDi value
2.87
Rank in China
917th of 1843
Rank in Henan
90th of 129

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

What about similarly populated cities?

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
HuaxianAbatGanyu

In new street additions, Huaxian built increasingly connected streets over time, while Abat built increasingly disconnected streets over time and Ganyu fluctuated in its street-construction patterns. Looking at the full network, Abat and Ganyu both became progressively more disconnected, while Huaxian became progressively more connected. Notably, Huaxian had a more sprawly network than Abat in 1975 but the two have since reversed their relative ranking.