Sivaganga 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 Sivaganga plotted against Tamil Nadu and India. The SNDi of new construction in Sivaganga rose steadily, compared to Tamil Nadu which rose steadily and India which followed a zig-zag trend with an overall increase. Most recently, Sivaganga's incremental SNDi rose from 2.0 to 2.45 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sivaganga ranked 2nd out of 121 cities in Tamil Nadu and 72nd out of 1868 in India as of 2020.

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

What about similarly populated cities?

• Adré, Chad
• Iguala, México
• Pipariya, India
• Jongphyong, North Korea
• Weihui, China
• Girardot, Colombia

In new street additions, Sivaganga built increasingly disconnected streets over time, while Adré fluctuated in its street-construction patterns and Jongphyong built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Sivaganga became progressively more disconnected, while Adré fluctuated in connectivity and Jongphyong grew more disconnected from 1975 through 1991-2005, then improved. Notably, Sivaganga had a more connected network than Adré in 1975 but the two have since reversed their relative ranking.