Qebchaq 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 Qebchaq plotted against Alborz and Iran. The SNDi of new construction in Qebchaq followed a zig-zag trend with an overall decrease, compared to Alborz which was at its lowest in 1976-1990 and Iran which rose steadily. Most recently, Qebchaq's incremental SNDi fell from 3.91 to 3.41 between 1991-2005 and 2006-2020. In terms of the aggregate network, Qebchaq ranked 4th out of 7 cities in Alborz and 133rd 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?

• Uzun, Uzbekistan
• Viên An, Vietnam
• Bharwari, India
• Polvilho, Brazil
• Lafayette, United States
• Mansa, India

In new street additions, Qebchaq fluctuated in its street-construction patterns, while Uzun built increasingly disconnected streets over time and Polvilho built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Qebchaq fluctuated in connectivity, while Uzun became progressively more disconnected and Polvilho grew more disconnected from 1975 through 1991-2005, then improved. Qebchaq and Uzun have been growing further apart in their street-network character since 1975.