Nahavand 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 Nahavand plotted against Hamadan and Iran. While Hamadan and Iran both rose steadily, Nahavand's new street additions rose steadily. Most recently, Nahavand's incremental SNDi rose from 2.74 to 3.05 between 1991-2005 and 2006-2020. In terms of the aggregate network, Nahavand ranked 1st out of 5 cities in Hamadan and 28th 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?

• Lingshou, China
• Chanchal, India
• Raghopur, India
• Neuwied, Germany
• Khutsong, South Africa
• Kyongsong, North Korea

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