Sullana 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 Sullana plotted against Piura and Peru. While Piura and Peru both followed a zig-zag trend with an overall increase, Sullana's new street additions followed a zig-zag trend with an overall decrease. Most recently, Sullana's incremental SNDi rose from 1.31 to 1.4 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sullana ranked 1st out of 4 cities in Piura and 2nd out of 43 in Peru as of 2020.

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

What about similarly populated cities?

• Chitrakoot Dham, India
• Kasumbalesa, Democratic Republic of the Congo
• Guanghan, China
• Mancherial, India
• Fukushima, Japan
• Divinópolis, Brazil

While Chitrakoot Dham and Mancherial both built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, Sullana fluctuated in its street-construction patterns in new street additions. For the full network, Sullana grew more disconnected from 1975 through 1976-1990, then improved, while Chitrakoot Dham became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Mancherial became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards.