Bumba in context: Street-network sprawl trends

Bumba in context

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
BumbaMongala (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 Bumba plotted against Mongala and Democratic Republic of the Congo. While Mongala and Democratic Republic of the Congo both followed a zig-zag trend with an overall increase, Bumba's new street additions followed a zig-zag trend with an overall increase. Most recently, Bumba's incremental SNDi rose from 3.58 to 4.78 between 1991-2005 and 2006-2020. In terms of the aggregate network, Bumba ranked 3rd out of 3 cities in Mongala and 83rd out of 186 in Democratic Republic of the Congo as of 2020.

New Street Additions (2006–2020)

SNDi value
4.78
Rank in Democratic Republic of the Congo
112th of 186
Rank in Mongala
3rd of 3

Entire Network (Aggregate)

SNDi value
2.84
Rank in Democratic Republic of the Congo
83rd of 186
Rank in Mongala
3rd of 3

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
BumbaMoreno ValleyChilpancingo

In new street additions, Bumba fluctuated in its street-construction patterns, while Moreno Valley built increasingly disconnected streets from 1975 through 1976-1990, then improved and Chilpancingo built increasingly disconnected streets over time. For the full network, Bumba and Chilpancingo both became progressively more disconnected, while Moreno Valley grew more disconnected from 1975 through 1976-1990, then improved. Bumba and Moreno Valley have been converging in their street-network character since 1975.