Gemena in context: Street-network sprawl trends

Gemena in context

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
GemenaSud-Ubangi (Region)Democratic Republic of the Congo (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Gemena plotted against Sud-Ubangi and Democratic Republic of the Congo. While Sud-Ubangi and Democratic Republic of the Congo both followed a zig-zag trend with an overall increase, Gemena's new street additions followed a zig-zag trend with an overall increase. Most recently, Gemena's incremental SNDi rose from 3.0 to 4.42 between 1991-2005 and 2006-2020. In terms of the aggregate network, Gemena ranked 3rd out of 5 cities in Sud-Ubangi and 71st out of 186 in Democratic Republic of the Congo as of 2020.

New Street Additions (2006–2020)

SNDi value
4.42
Rank in Democratic Republic of the Congo
101st of 186
Rank in Sud-Ubangi
2nd of 5

Entire Network (Aggregate)

SNDi value
2.71
Rank in Democratic Republic of the Congo
71st of 186
Rank in Sud-Ubangi
3rd of 5

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

What about similarly populated cities?

2.43.24<19751976–19901991–20052006–2020SNDi of street additions
2.43.24<19751976–19901991–20052006–2020SNDi of entire street network
GemenaPakpattanTongling

In new street additions, Gemena and Tongling both fluctuated in its street-construction patterns, while Pakpattan built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend. Notably, Gemena had a more connected network than Tongling in 1975 but the two have since reversed their relative ranking.