Huoshan 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 Huoshan plotted against Anhui and China. The SNDi of new construction in Huoshan was at its lowest in 1976-1990, compared to Anhui which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Huoshan's incremental SNDi rose from 2.14 to 2.77 between 1991-2005 and 2006-2020. In terms of the aggregate network, Huoshan ranked 31st out of 74 cities in Anhui and 547th 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?

• Arinodai, Japan
• Madhugiri, India
• Paracatu, Brazil
• Montreux, Switzerland
• Bilecik, Turkey
• Naushahro Feroze, Pakistan

In new street additions, Huoshan built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Arinodai fluctuated in its street-construction patterns and Montreux built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Arinodai and Montreux both became progressively more disconnected, while Huoshan became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Notably, Huoshan had a more connected network than Arinodai in 1975 but the two have since reversed their relative ranking.