Vwawa in context: Street-network sprawl trends

Vwawa 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
VwawaSongwe (Region)Tanzania (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Vwawa plotted against Songwe and Tanzania. The SNDi of new construction in Vwawa rose steadily, compared to Songwe which peaked in 1991-2005 and Tanzania which was at its lowest in 1976-1990. Most recently, Vwawa's incremental SNDi rose from 4.1 to 4.34 between 1991-2005 and 2006-2020. In terms of the aggregate network, Vwawa ranked 2nd out of 2 cities in Songwe and 40th out of 45 in Tanzania as of 2020.

New Street Additions (2006–2020)

SNDi value
4.34
Rank in Tanzania
39th of 45
Rank in Songwe
2nd of 2

Entire Network (Aggregate)

SNDi value
3.48
Rank in Tanzania
40th of 45
Rank in Songwe
2nd of 2

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

What about similarly populated cities?

246810<19751976–19901991–20052006–2020SNDi of street additions
246810<19751976–19901991–20052006–2020SNDi of entire street network
VwawaDormagenNdenderu

In new street additions, Vwawa built increasingly disconnected streets over time, while Dormagen fluctuated in its street-construction patterns and Ndenderu fluctuated in its street-construction patterns. For the full network, Vwawa and Ndenderu both became progressively more disconnected, while Dormagen fluctuated in connectivity. Notably, Vwawa had a more connected network than Dormagen in 1975 but the two have since reversed their relative ranking.