Siguiri in context: Street-network sprawl trends

Siguiri in context

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
SiguiriKankan (Region)Guinea (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Siguiri plotted against Kankan and Guinea. While Kankan and Guinea both rose steadily, Siguiri's new street additions rose steadily. Most recently, Siguiri's incremental SNDi rose from 1.52 to 2.83 between 1991-2005 and 2006-2020. In terms of the aggregate network, Siguiri ranked 6th out of 8 cities in Kankan and 9th out of 24 in Guinea as of 2020.

New Street Additions (2006–2020)

SNDi value
2.83
Rank in Guinea
8th of 24
Rank in Kankan
6th of 8

Entire Network (Aggregate)

SNDi value
2.38
Rank in Guinea
9th of 24
Rank in Kankan
6th of 8

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

What about similarly populated cities?

1.522.53<19751976–19901991–20052006–2020SNDi of street additions
1.522.53<19751976–19901991–20052006–2020SNDi of entire street network
SiguiriNan CountyRzeszow

In new street additions, Siguiri and Rzeszów both built increasingly disconnected streets over time, while Nan County built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Siguiri and Rzeszów both became progressively more disconnected, while Nan County grew more disconnected from 1975 through 1991-2005, then improved. Notably, Siguiri had a more connected network than Nan County in 1975 but the two have since reversed their relative ranking.