Nancha in context: Street-network sprawl trends

Nancha in context

33.64.24.8<19751976–19901991–20052006–2020SNDi of street additions
33.64.24.8<19751976–19901991–20052006–2020SNDi of entire street network
NanchaHeilongjiang (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Nancha plotted against Heilongjiang and China. While Heilongjiang and China both followed a zig-zag trend with an overall increase, Nancha's new street additions followed a zig-zag trend with an overall increase. Most recently, Nancha's incremental SNDi rose from 2.76 to 3.82 between 1991-2005 and 2006-2020. In terms of the aggregate network, Nancha ranked 52nd out of 67 cities in Heilongjiang and 1095th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.82
Rank in China
1317th of 1843
Rank in Heilongjiang
46th of 67

Entire Network (Aggregate)

SNDi value
3.09
Rank in China
1095th of 1843
Rank in Heilongjiang
52nd of 67

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
NanchaAnzhouAlphen aan den Rijn

In new street additions, Nancha fluctuated in its street-construction patterns, while Anzhou built increasingly disconnected streets from 1975 through 1991-2005, then improved and Alphen aan den Rijn built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Nancha fluctuated in connectivity, while Anzhou became progressively more disconnected and Alphen aan den Rijn became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Notably, Nancha had a more sprawly network than Anzhou in 1975 but the two have since reversed their relative ranking.