Tieli in context: Street-network sprawl trends

Tieli 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
TieliHeilongjiang (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tieli plotted against Heilongjiang and China. The SNDi of new construction in Tieli peaked in 1976-1990, compared to Heilongjiang which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Tieli's incremental SNDi fell from 1.51 to 1.37 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tieli ranked 14th out of 67 cities in Heilongjiang and 148th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
1.37
Rank in China
48th of 1843
Rank in Heilongjiang
5th of 67

Entire Network (Aggregate)

SNDi value
1.85
Rank in China
148th of 1843
Rank in Heilongjiang
14th of 67

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

What about similarly populated cities?

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
TieliYellanduLiuzhuang

In new street additions, Tieli built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Yellandu built increasingly disconnected streets from 1975 through 1991-2005, then improved and Liuzhuang built increasingly disconnected streets over time. Looking at the full network, Yellandu and Liuzhuang both became progressively more disconnected, while Tieli grew more disconnected from 1975 through 1976-1990, then improved. Tieli and Yellandu have been growing further apart in their street-network character since 1975.