Thalassery 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 Thalassery plotted against Kerala and India. The SNDi of new construction in Thalassery was at its lowest in 1976-1990, 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, Thalassery's incremental SNDi rose from 3.66 to 4.32 between 1991-2005 and 2006-2020. In terms of the aggregate network, Thalassery ranked 4th out of 48 cities in Kerala and 936th 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?

• Dhule, India
• Kingston, Jamaica
• Vapi, India
• Nuremberg, Germany
• Jashore, Bangladesh
• Changzhi, China

In new street additions, Thalassery built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Dhule fluctuated in its street-construction patterns and Nuremberg built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Thalassery became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Dhule fluctuated in connectivity and Nuremberg became progressively more disconnected.