Boa Vista in context: Street-network sprawl trends

Boa Vista in context

1.21.82.43<19751976–19901991–20052006–2020SNDi of street additions
1.21.82.43<19751976–19901991–20052006–2020SNDi of entire street network
Boa VistaRoraima (Region)Brazil (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Boa Vista plotted against Roraima and Brazil. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Boa Vista's incremental SNDi rose from 1.32 to 1.94 between 1991-2005 and 2006-2020. In terms of the aggregate network, Boa Vista ranked 1st out of 1 cities in Roraima and 22nd out of 365 in Brazil as of 2020.

New Street Additions (2006–2020)

SNDi value
1.94
Rank in Brazil
49th of 365
Rank in Roraima
1st of 1

Entire Network (Aggregate)

SNDi value
1.45
Rank in Brazil
22nd of 365
Rank in Roraima
1st of 1

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

What about similarly populated cities?

1.82.73.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.6<19751976–19901991–20052006–2020SNDi of entire street network
Boa VistaKhersonNgaoundere

While Kherson and Ngaoundéré both built increasingly disconnected streets over time, Boa Vista fluctuated in its street-construction patterns in new street additions. Looking at the full network, Kherson and Ngaoundéré both became progressively more disconnected, while Boa Vista fluctuated in connectivity. Boa Vista and Ngaoundéré have been growing further apart in their street-network character since 1975.