Talesh 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 Talesh plotted against Gilan and Iran. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Talesh's incremental SNDi rose from 5.29 to 5.57 between 1991-2005 and 2006-2020. In terms of the aggregate network, Talesh ranked 3rd out of 4 cities in Gilan and 146th 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?

• WenJiancun, China
• Echizen, Japan
• 香班哈日根牧场, China
• Chengannur, India
• Karjat, India
• Kankiya, Nigeria

In new street additions, Talesh built increasingly disconnected streets over time, while WenJiancun fluctuated in its street-construction patterns and Chengannur built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Talesh became progressively more disconnected, while WenJiancun grew more disconnected from 1975 through 1991-2005, then improved and Chengannur became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Talesh and WenJiancun have been converging in their street-network character since 1975.