Nansio in context: Street-network sprawl trends

Nansio in context

22.533.5<19751976–19901991–20052006–2020SNDi of street additions
22.533.5<19751976–19901991–20052006–2020SNDi of entire street network
NansioMwanza (Region)Tanzania (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Nansio plotted against Mwanza and Tanzania. The SNDi of new construction in Nansio peaked in 1991-2005, compared to Mwanza which was at its lowest in 1976-1990 and Tanzania which was at its lowest in 1976-1990. Most recently, Nansio's incremental SNDi fell from 3.0 to 2.54 between 1991-2005 and 2006-2020. In terms of the aggregate network, Nansio ranked 2nd out of 3 cities in Mwanza and 25th out of 45 in Tanzania as of 2020.

New Street Additions (2006–2020)

SNDi value
2.54
Rank in Tanzania
21st of 45
Rank in Mwanza
2nd of 3

Entire Network (Aggregate)

SNDi value
2.39
Rank in Tanzania
25th of 45
Rank in Mwanza
2nd of 3

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
NansioBarkaBouza

In new street additions, Nansio built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Barka fluctuated in its street-construction patterns and Bouza built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Nansio became progressively more disconnected, while Barka fluctuated in connectivity and Bouza became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Nansio and Barka have been converging in their street-network character since 1975.