Puliyangudi 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 Puliyangudi plotted against Tamil Nadu and India. The SNDi of new construction in Puliyangudi rose steadily, compared to Tamil Nadu which rose steadily and India which followed a zig-zag trend with an overall increase. Most recently, Puliyangudi's incremental SNDi rose from 2.69 to 4.51 between 1991-2005 and 2006-2020. In terms of the aggregate network, Puliyangudi ranked 7th out of 121 cities in Tamil Nadu and 191st 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?

• Tudun Wada, Nigeria
• Mekoni, Ethiopia
• Scranton, United States
• Mirsharai, Bangladesh
• Gouda, Netherlands
• Palo Negro, Venezuela

In new street additions, Puliyangudi built increasingly disconnected streets over time, while Tudun Wada built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Mirsharai built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Puliyangudi became progressively more disconnected, while Tudun Wada became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Mirsharai grew more disconnected from 1975 through 1991-2005, then improved.