Serrekunda in context: Street-network sprawl trends

Serrekunda in context

1.51.82.12.4<19751976–19901991–20052006–2020SNDi of street additions
1.51.82.12.4<19751976–19901991–20052006–2020SNDi of entire street network
SerrekundaWestern (Region)Gambia (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Serrekunda plotted against Western and Gambia. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Serrekunda's incremental SNDi rose from 1.99 to 2.27 between 1991-2005 and 2006-2020. In terms of the aggregate network, Serrekunda ranked 2nd out of 2 cities in Western and 2nd out of 3 in Gambia as of 2020.

New Street Additions (2006–2020)

SNDi value
2.27
Rank in Gambia
2nd of 3
Rank in Western
2nd of 2

Entire Network (Aggregate)

SNDi value
1.87
Rank in Gambia
2nd of 3
Rank in Western
2nd of 2

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

What about similarly populated cities?

1.21.82.43<19751976–19901991–20052006–2020SNDi of street additions
1.21.82.43<19751976–19901991–20052006–2020SNDi of entire street network
SerrekundaQiqiharTouba

In new street additions, Serrekunda fluctuated in its street-construction patterns, while Qiqihar built increasingly disconnected streets from 1975 through 1991-2005, then improved and Touba built increasingly disconnected streets over time. For the full street network, though, all three cities follow the same trend. Serrekunda and Touba have been growing further apart in their street-network character since 1975.