Bambey in context: Street-network sprawl trends

Bambey in context

1234<19751976–19901991–20052006–2020SNDi of street additions
1234<19751976–19901991–20052006–2020SNDi of entire street network
BambeyDiourbel (Region)Senegal (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Bambey plotted against Diourbel and Senegal. The SNDi of new construction in Bambey rose steadily, compared to Diourbel which followed a zig-zag trend with an overall increase and Senegal which followed a zig-zag trend with an overall increase. Most recently, Bambey's incremental SNDi rose from 2.92 to 4.35 between 1991-2005 and 2006-2020. In terms of the aggregate network, Bambey ranked 3rd out of 3 cities in Diourbel and 24th out of 25 in Senegal as of 2020.

New Street Additions (2006–2020)

SNDi value
4.35
Rank in Senegal
24th of 25
Rank in Diourbel
3rd of 3

Entire Network (Aggregate)

SNDi value
2.48
Rank in Senegal
24th of 25
Rank in Diourbel
3rd of 3

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

What about similarly populated cities?

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
BambeyMoptiOhmi-Hachiman

In new street additions, Bambey and Mopti both built increasingly disconnected streets over time, while Ohmi-Hachiman 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, Bambey had a more connected network than Ohmi-Hachiman in 1975 but the two have since reversed their relative ranking.