Boli in context: Street-network sprawl trends

Boli in context

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
BoliHeilongjiang (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Boli plotted against Heilongjiang and China. The SNDi of new construction in Boli rose steadily, compared to Heilongjiang which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Boli's incremental SNDi rose from 2.99 to 4.96 between 1991-2005 and 2006-2020. In terms of the aggregate network, Boli ranked 31st out of 67 cities in Heilongjiang and 497th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
4.96
Rank in China
1624th of 1843
Rank in Heilongjiang
61st of 67

Entire Network (Aggregate)

SNDi value
2.38
Rank in China
497th of 1843
Rank in Heilongjiang
31st of 67

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

What about similarly populated cities?

246810<19751976–19901991–20052006–2020SNDi of street additions
246810<19751976–19901991–20052006–2020SNDi of entire street network
BoliCalaisKamanyola

Boli, Calais, and Kamanyola all built increasingly disconnected streets over time in new street construction. Looking at the full network, Calais and Kamanyola both became progressively more disconnected, while Boli became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Boli and Calais have been converging in their street-network character since 1975.