Luonan in context: Street-network sprawl trends

Luonan in context

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
LuonanShaanxi (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Luonan plotted against Shaanxi and China. The SNDi of new construction in Luonan followed a zig-zag trend with an overall decrease, compared to Shaanxi which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Luonan's incremental SNDi fell from 2.91 to 2.69 between 1991-2005 and 2006-2020. In terms of the aggregate network, Luonan ranked 28th out of 62 cities in Shaanxi and 757th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.69
Rank in China
650th of 1843
Rank in Shaanxi
24th of 62

Entire Network (Aggregate)

SNDi value
2.7
Rank in China
757th of 1843
Rank in Shaanxi
28th of 62

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

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
LuonanNasirnagarZihuatanejo

In new street additions, Luonan fluctuated in its street-construction patterns, while Nasirnagar fluctuated in its street-construction patterns and Zihuatanejo built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Luonan fluctuated in connectivity, while Nasirnagar fluctuated in connectivity and Zihuatanejo became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Notably, Luonan had a more sprawly network than Zihuatanejo in 1975 but the two have since reversed their relative ranking.