Parnaíba in context: Street-network sprawl trends

Parnaiba 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
ParnaibaPiaui (Region)Brazil (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Parnaíba plotted against Piauí and Brazil. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Parnaíba's incremental SNDi rose from 1.56 to 1.8 between 1991-2005 and 2006-2020. In terms of the aggregate network, Parnaíba ranked 1st out of 3 cities in Piauí and 46th out of 365 in Brazil as of 2020.

New Street Additions (2006–2020)

SNDi value
1.8
Rank in Brazil
32nd of 365
Rank in Piauí
1st of 3

Entire Network (Aggregate)

SNDi value
1.57
Rank in Brazil
46th of 365
Rank in Piauí
1st of 3

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
ParnaibaBaishaMogi Guacu

In new street additions, Parnaíba fluctuated in its street-construction patterns, while Baisha fluctuated in its street-construction patterns and Mogi Guaçu built increasingly disconnected streets over time. For the full network, Parnaíba and Mogi Guaçu both became progressively more disconnected, while Baisha fluctuated in connectivity. Parnaíba and Mogi Guaçu have been growing further apart in their street-network character since 1975.