Sondalia 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 Sondalia plotted against West Bengal and India. The SNDi of new construction in Sondalia peaked in 1976-1990, 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, Sondalia's incremental SNDi fell from 5.69 to 5.64 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sondalia ranked 107th out of 140 cities in West Bengal and 1677th 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?

• Khurai, India
• Usulután, El Salvador
• Tsuruoka, Japan
• Olten, Switzerland
• Perbaungan, Indonesia
• Zango, Nigeria

In new street additions, Sondalia and Khurai both built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Olten built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Sondalia grew more disconnected from 1975 through 1976-1990, then improved, while Khurai grew more disconnected from 1975 through 1991-2005, then improved and Olten became progressively more disconnected.