Bongaigaon 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 Bongaigaon plotted against Assam and India. The SNDi of new construction in Bongaigaon rose steadily, compared to Assam which rose steadily and India which followed a zig-zag trend with an overall increase. Most recently, Bongaigaon's incremental SNDi rose from 4.81 to 5.19 between 1991-2005 and 2006-2020. In terms of the aggregate network, Bongaigaon ranked 27th out of 67 cities in Assam and 899th 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?

• Baghua, India
• Thái Bình, Vietnam
• Xinyi, China
• Chemnitz, Germany
• Gaizhou, China
• Jinka, Ethiopia

In new street additions, Bongaigaon and Chemnitz both built increasingly disconnected streets over time, while Baghua built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Bongaigaon and Chemnitz both became progressively more disconnected, while Baghua became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards.