Quchan 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 Quchan plotted against Razavi Khorasan and Iran. While Razavi Khorasan and Iran both rose steadily, Quchan's new street additions rose steadily. Most recently, Quchan's incremental SNDi rose from 3.2 to 3.68 between 1991-2005 and 2006-2020. In terms of the aggregate network, Quchan ranked 4th out of 9 cities in Razavi Khorasan and 82nd out of 169 in Iran as of 2020.

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

What about similarly populated cities?

• Minquan, China
• Barbacena, Brazil
• Ido Ekiti, Nigeria
• Singrauli, India
• Tumbes, Peru
• Guangfu, China

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