São Sebastião in context: Street-network sprawl trends

Sao Sebastiao in context

2.12.83.54.24.9<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.24.9<19751976–19901991–20052006–2020SNDi of entire street network
Sao SebastiaoDistrito Federal (Region)Brazil (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with São Sebastião plotted against Distrito Federal and Brazil. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, São Sebastião's incremental SNDi rose from 2.45 to 3.72 between 1991-2005 and 2006-2020. In terms of the aggregate network, São Sebastião ranked 5th out of 9 cities in Distrito Federal and 270th out of 365 in Brazil as of 2020.

New Street Additions (2006–2020)

SNDi value
3.72
Rank in Brazil
232nd of 365
Rank in Distrito Federal
6th of 9

Entire Network (Aggregate)

SNDi value
2.98
Rank in Brazil
270th of 365
Rank in Distrito Federal
5th of 9

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
Sao SebastiaoVacavilleHarrisburg

In new street additions, São Sebastião and Vacaville both fluctuated in its street-construction patterns, while Harrisburg built increasingly disconnected streets over time. Looking at the full network, Vacaville and Harrisburg both became progressively more disconnected, while São Sebastião fluctuated in connectivity. Notably, São Sebastião had a more sprawly network than Vacaville in 1975 but the two have since reversed their relative ranking.