Jiaohe 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 Jiaohe plotted against Jilin and China. The SNDi of new construction in Jiaohe peaked in 1991-2005, compared to Jilin which peaked in 1976-1990 and China which followed a zig-zag trend with an overall increase. Most recently, Jiaohe's incremental SNDi fell from 3.15 to 1.66 between 1991-2005 and 2006-2020. In terms of the aggregate network, Jiaohe ranked 10th out of 47 cities in Jilin and 185th 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?

• Kokshetau, Kazakhstan
• Tazumoddin, Bangladesh
• Trondheim, Norway
• Jianshui, China
• Tuz Khormato, Iraq
• Sa`dah, Yemen

While Kokshetau and Jianshui both fluctuated in its street-construction patterns, Jiaohe built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full network, Jiaohe grew more disconnected from 1975 through 1991-2005, then improved, while Kokshetau became progressively more disconnected and Jianshui grew more disconnected from 1975 through 1976-1990, then improved. Notably, Jiaohe had a more connected network than Kokshetau in 1975 but the two have since reversed their relative ranking.