Ishara 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 Ishara plotted against Ogun and Nigeria. The SNDi of new construction in Ishara rose steadily, compared to Ogun which rose steadily and Nigeria which followed a zig-zag trend with an overall increase. Most recently, Ishara's incremental SNDi rose from 4.14 to 5.09 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ishara ranked 7th out of 16 cities in Ogun and 209th out of 422 in Nigeria as of 2020.

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

• Rajgara, India
• Dogari Tiv, Nigeria
• Sabirabad, Azerbaijan
• Nuapatna, India
• Haldibari, India
• Heyun, China

In new street additions, Ishara built increasingly disconnected streets over time, while Rajgara built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Nuapatna fluctuated in its street-construction patterns. For the full network, Ishara became progressively more disconnected, while Rajgara became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Nuapatna fluctuated in connectivity. Ishara and Rajgara have been converging in their street-network character since 1975.