Chamagram 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 Chamagram plotted against West Bengal and India. The SNDi of new construction in Chamagram peaked in 1991-2005, compared to West Bengal which followed a zig-zag trend with an overall increase and India which followed a zig-zag trend with an overall increase. Most recently, Chamagram's incremental SNDi fell from 5.03 to 4.68 between 1991-2005 and 2006-2020. In terms of the aggregate network, Chamagram ranked 63rd out of 140 cities in West Bengal and 1358th 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?

• Erfurt, Germany
• Sasebo, Japan
• Atakpamé, Togo
• Cubal, Angola
• Gaddanakeri Tanda, India
• Metz, France

Chamagram, Erfurt, and Cubal all built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street construction. For the full network, Chamagram and Erfurt both became progressively more disconnected, while Cubal grew more disconnected from 1975 through 1991-2005, then improved. Chamagram and Erfurt have been growing further apart in their street-network character since 1975.