Parsabad 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 Parsabad plotted against Ardebil and Iran. While Ardebil and Iran both rose steadily, Parsabad's new street additions rose steadily. Most recently, Parsabad's incremental SNDi rose from 3.02 to 3.98 between 1991-2005 and 2006-2020. In terms of the aggregate network, Parsabad ranked 3rd out of 4 cities in Ardebil and 112th 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?

• Qalat Sukkar, Iraq
• Mulabagilu, India
• Bir El Ater, Algeria
• Cazombo, Angola
• San Giuseppe Vesuviano, Italy
• Miass, Russia

In new street additions, Parsabad built increasingly disconnected streets over time, while Qalat Sukkar fluctuated in its street-construction patterns and Cazombo built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Parsabad became progressively more disconnected, while Qalat Sukkar became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Cazombo fluctuated in connectivity. Notably, Parsabad had a more connected network than Qalat Sukkar in 1975 but the two have since reversed their relative ranking.