Barreiro in context: Street-network sprawl trends

Barreiro in context

33.33.63.9<19751976–19901991–20052006–2020SNDi of street additions
33.33.63.9<19751976–19901991–20052006–2020SNDi of entire street network
BarreiroSetubal (Region)Portugal (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Barreiro plotted against Setúbal and Portugal. The SNDi of new construction in Barreiro peaked in 1991-2005, compared to Setúbal which rose steadily and Portugal which rose steadily. Most recently, Barreiro's incremental SNDi fell from 3.23 to 2.87 between 1991-2005 and 2006-2020. In terms of the aggregate network, Barreiro ranked 3rd out of 4 cities in Setúbal and 5th out of 9 in Portugal as of 2020.

New Street Additions (2006–2020)

SNDi value
2.87
Rank in Portugal
1st of 9
Rank in Setúbal
1st of 4

Entire Network (Aggregate)

SNDi value
3.03
Rank in Portugal
5th of 9
Rank in Setúbal
3rd of 4

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

What about similarly populated cities?

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
BarreiroNembeUssurijsk

In new street additions, Barreiro and Nembe both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Ussurijsk fluctuated in its street-construction patterns. For the full network, Barreiro and Nembe both grew more disconnected from 1975 through 1991-2005, then improved, while Ussurijsk became progressively more disconnected. Barreiro and Nembe have been converging in their street-network character since 1975.