Isiro 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 Isiro plotted against Haut-Uele and Democratic Republic of the Congo. The SNDi of new construction in Isiro rose steadily, compared to Haut-Uele which rose steadily and Democratic Republic of the Congo which followed a zig-zag trend with an overall increase. Most recently, Isiro's incremental SNDi rose from 3.98 to 5.75 between 1991-2005 and 2006-2020. In terms of the aggregate network, Isiro ranked 3rd out of 3 cities in Haut-Uele and 89th out of 186 in Democratic Republic of the Congo as of 2020.

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

What about similarly populated cities?

• Lleida, Spain
• Delingat, Egypt
• Yangling, China
• Yanghe, China
• Tongjiang County, China
• Samangan, Afghanistan

In new street additions, Isiro built increasingly disconnected streets over time, while Lleida fluctuated in its street-construction patterns and Yanghe built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Isiro and Lleida both became progressively more disconnected, while Yanghe grew more disconnected from 1975 through 1991-2005, then improved. Isiro and Lleida have been growing further apart in their street-network character since 1975.