Heyuan in context: Street-network sprawl trends

Heyuan in context

2.83.54.24.9<19751976–19901991–20052006–2020SNDi of street additions
2.83.54.24.9<19751976–19901991–20052006–2020SNDi of entire street network
HeyuanGuangdong (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Heyuan plotted against Guangdong and China. The SNDi of new construction in Heyuan was at its lowest in 1976-1990, compared to Guangdong which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Heyuan's incremental SNDi rose from 2.85 to 3.3 between 1991-2005 and 2006-2020. In terms of the aggregate network, Heyuan ranked 69th out of 133 cities in Guangdong and 1236th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.3
Rank in China
1047th of 1843
Rank in Guangdong
44th of 133

Entire Network (Aggregate)

SNDi value
3.28
Rank in China
1236th of 1843
Rank in Guangdong
69th of 133

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
HeyuanThiesGusau

In new street additions, Heyuan built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Thiès fluctuated in its street-construction patterns and Gusau built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Heyuan became progressively more connected, while Thiès fluctuated in connectivity and Gusau became progressively more disconnected. Heyuan and Gusau have been converging in their street-network character since 1975.