Bissau in context: Street-network sprawl trends

Bissau in context

2.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
2.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
BissauGuinea-Bissau (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Bissau plotted against Guinea-Bissau. Both Bissau and Guinea-Bissau follow the same trend. Most recently, Bissau's incremental SNDi rose from 3.82 to 4.37 between 1991-2005 and 2006-2020. In terms of the aggregate network, Bissau ranked 3rd out of 3 in Guinea-Bissau as of 2020.

New Street Additions (2006–2020)

SNDi value
4.37
Rank in Guinea-Bissau
3rd of 3

Entire Network (Aggregate)

SNDi value
3.37
Rank in Guinea-Bissau
3rd of 3

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
BissauToyohashiKuching

In new street additions, Bissau and Kuching both built increasingly disconnected streets over time, while Toyohashi built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full street network, though, all three cities follow the same trend. Bissau and Toyohashi have been growing further apart in their street-network character since 1975.