Odanthurai 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 Odanthurai plotted against Tamil Nadu and India. The SNDi of new construction in Odanthurai rose steadily, compared to Tamil Nadu which rose steadily and India which followed a zig-zag trend with an overall increase. Most recently, Odanthurai's incremental SNDi rose from 4.51 to 5.49 between 1991-2005 and 2006-2020. In terms of the aggregate network, Odanthurai ranked 79th out of 121 cities in Tamil Nadu and 1075th 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?

• Luliang, China
• Jiaoling, China
• Muara Enim, Indonesia
• Sidi Kacem, Morocco
• Anjar, India
• Gungu, Democratic Republic of the Congo

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