Qingyang in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Qingyang plotted against Gansu and China. The SNDi of new construction in Qingyang was at its lowest in 1976-1990, compared to Gansu which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Qingyang's incremental SNDi rose from 4.36 to 5.04 between 1991-2005 and 2006-2020. In terms of the aggregate network, Qingyang ranked 17th out of 29 cities in Gansu and 1633rd out of 1843 in China as of 2020.

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

What about similarly populated cities?

• Chuncheon, South Korea
• Mulongo, Democratic Republic of the Congo
• Jalingo, Nigeria
• Hami, China
• Neyshabur, Iran
• Campeche, México

In new street additions, Qingyang built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Chuncheon built increasingly disconnected streets over time and Hami fluctuated in its street-construction patterns. For the full network, Qingyang became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Chuncheon became progressively more disconnected and Hami fluctuated in connectivity. Qingyang and Hami have been growing further apart in their street-network character since 1975.