Nyamilima 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 Nyamilima plotted against Nord-Kivu and Democratic Republic of the Congo. The SNDi of new construction in Nyamilima was at its lowest in 1976-1990, compared to Nord-Kivu which followed a zig-zag trend with an overall increase and Democratic Republic of the Congo which followed a zig-zag trend with an overall increase. Most recently, Nyamilima's incremental SNDi rose from 2.73 to 3.12 between 1991-2005 and 2006-2020. In terms of the aggregate network, Nyamilima ranked 6th out of 16 cities in Nord-Kivu and 68th 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?

• Guodian, China
• Amparo, Brazil
• Esik, Kazakhstan
• Sungaiguntung, Indonesia
• Saint-Jérôme, Canada
• Arogbo, Nigeria

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