Boma in context: Street-network sprawl trends

Boma in context

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
BomaKongo-Central (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 Boma plotted against Kongo-Central and Democratic Republic of the Congo. The SNDi of new construction in Boma rose steadily, compared to Kongo-Central which rose steadily and Democratic Republic of the Congo which followed a zig-zag trend with an overall increase. Most recently, Boma's incremental SNDi rose from 3.4 to 3.5 between 1991-2005 and 2006-2020. In terms of the aggregate network, Boma ranked 6th out of 15 cities in Kongo-Central and 95th out of 186 in Democratic Republic of the Congo as of 2020.

New Street Additions (2006–2020)

SNDi value
3.5
Rank in Democratic Republic of the Congo
65th of 186
Rank in Kongo-Central
5th of 15

Entire Network (Aggregate)

SNDi value
3.16
Rank in Democratic Republic of the Congo
95th of 186
Rank in Kongo-Central
6th of 15

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
BomaDossoBabol

Boma, Dosso, and Babol all built increasingly disconnected streets over time in new street construction. The same pattern holds for the full street network.