Buchanan in context: Street-network sprawl trends

Buchanan in context

345678<19751976–19901991–20052006–2020SNDi of street additions
345678<19751976–19901991–20052006–2020SNDi of entire street network
BuchananGrand Bassa (Region)Liberia (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Buchanan plotted against Grand Bassa and Liberia. The SNDi of new construction in Buchanan rose steadily, compared to Grand Bassa which peaked in 1991-2005 and Liberia which followed a zig-zag trend with an overall increase. Most recently, Buchanan's incremental SNDi rose from 5.86 to 6.29 between 1991-2005 and 2006-2020. In terms of the aggregate network, Buchanan ranked 1st out of 1 cities in Grand Bassa and 2nd out of 9 in Liberia as of 2020.

New Street Additions (2006–2020)

SNDi value
6.29
Rank in Liberia
4th of 9
Rank in Grand Bassa
1st of 1

Entire Network (Aggregate)

SNDi value
4.35
Rank in Liberia
2nd of 9
Rank in Grand Bassa
1st of 1

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

What about similarly populated cities?

4567<19751976–19901991–20052006–2020SNDi of street additions
4567<19751976–19901991–20052006–2020SNDi of entire street network
BuchananNguzu EddaBajpur

In new street additions, Buchanan and Bajpur both built increasingly disconnected streets over time, while Nguzu Edda fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Buchanan and Bajpur have been converging in their street-network character since 1975.