Ngandajika 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 Ngandajika plotted against Lomami and Democratic Republic of the Congo. The SNDi of new construction in Ngandajika peaked in 1991-2005, compared to Lomami which rose steadily and Democratic Republic of the Congo which followed a zig-zag trend with an overall increase. Most recently, Ngandajika's incremental SNDi fell from 4.36 to 3.69 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ngandajika ranked 3rd out of 8 cities in Lomami and 70th 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?

• Valsad, India
• Jiangyou, China
• Vinh Long, Vietnam
• Birpur, India
• Novi Sad, Serbia
• Sikasso, Mali

While Valsad and Birpur both built increasingly disconnected streets over time, Ngandajika built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full street network, though, all three cities follow the same trend. Ngandajika and Valsad have been growing further apart in their street-network character since 1975.