Attingal 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 Attingal plotted against Kerala and India. The SNDi of new construction in Attingal was at its lowest in 1991-2005, compared to Kerala which was at its lowest in 1976-1990 and India which followed a zig-zag trend with an overall increase. Most recently, Attingal's incremental SNDi rose from 4.79 to 5.97 between 1991-2005 and 2006-2020. In terms of the aggregate network, Attingal ranked 32nd out of 48 cities in Kerala and 1598th 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?

• Chhindwara, India
• Basel, Switzerland
• Greater Noida, India
• Ponta Grossa, Brazil
• Shariatpur, Bangladesh
• Lipetsk, Russia

In new street additions, Attingal built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns, while Chhindwara fluctuated in its street-construction patterns and Ponta Grossa built increasingly disconnected streets over time. Looking at the full network, Chhindwara and Ponta Grossa both became progressively more disconnected, while Attingal became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Attingal and Chhindwara have been converging in their street-network character since 1975.