Kollegal 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 Kollegal plotted against Karnataka and India. The SNDi of new construction in Kollegal was at its lowest in 1976-1990, compared to Karnataka which followed a zig-zag trend with an overall increase and India which followed a zig-zag trend with an overall increase. Most recently, Kollegal's incremental SNDi rose from 2.07 to 3.81 between 1991-2005 and 2006-2020. In terms of the aggregate network, Kollegal ranked 15th out of 96 cities in Karnataka and 203rd 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?

• Balakot, Pakistan
• Eslamabad-e Gharb, Iran
• Tral, Jammu and Kashmir
• Er Roseires, Sudan
• Liaozhong, China
• Sheqi, China

In new street additions, Kollegal built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Balakot built increasingly disconnected streets over time and Er Roseires built increasingly connected streets over time. For the full network, Kollegal became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards, while Balakot became progressively more disconnected and Er Roseires became progressively more connected. Kollegal and Balakot have been growing further apart in their street-network character since 1975.