Sumbawanga in context: Street-network sprawl trends

Sumbawanga in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Sumbawanga plotted against Rukwa and Tanzania. The SNDi of new construction in Sumbawanga rose steadily, compared to Rukwa which rose steadily and Tanzania which was at its lowest in 1976-1990. Most recently, Sumbawanga's incremental SNDi rose from 2.57 to 2.62 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sumbawanga ranked 1st out of 1 cities in Rukwa and 21st out of 45 in Tanzania as of 2020.

New Street Additions (2006–2020)

SNDi value
2.62
Rank in Tanzania
25th of 45
Rank in Rukwa
1st of 1

Entire Network (Aggregate)

SNDi value
2.23
Rank in Tanzania
21st of 45
Rank in Rukwa
1st of 1

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

What about similarly populated cities?

2.12.42.73<19751976–19901991–20052006–2020SNDi of street additions
2.12.42.73<19751976–19901991–20052006–2020SNDi of entire street network
SumbawangaKwaMhlangaVosman

While KwaMhlanga and Vosman both fluctuated in its street-construction patterns, Sumbawanga built increasingly disconnected streets over time in new street additions. Looking at the full network, KwaMhlanga and Vosman both fluctuated in connectivity, while Sumbawanga became progressively more disconnected.