Ayyampettai 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 Ayyampettai plotted against Tamil Nadu and India. While Tamil Nadu and India both followed a zig-zag trend with an overall increase, Ayyampettai's new street additions followed a zig-zag trend with an overall increase. Most recently, Ayyampettai's incremental SNDi rose from 4.87 to 6.25 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ayyampettai ranked 111th out of 121 cities in Tamil Nadu and 1600th 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?

• Mineralnye Vody, Russia
• Granollers, Spain
• Shamsabad, India
• Sarni, India
• Hengfeng, China
• Gulavthi, India

In new street additions, Ayyampettai fluctuated in its street-construction patterns, while Mineralnye Vody built increasingly disconnected streets over time and Sarni built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Mineralnye Vody and Sarni both became progressively more disconnected, while Ayyampettai became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Ayyampettai and Sarni have been growing further apart in their street-network character since 1975.