Poznan in context: Street-network sprawl trends

Poznan in context

1.82.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
PoznanWielkopolskie (Region)Poland (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Poznan plotted against Wielkopolskie and Poland. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Poznan's incremental SNDi rose from 2.81 to 3.31 between 1991-2005 and 2006-2020. In terms of the aggregate network, Poznan ranked 2nd out of 6 cities in Wielkopolskie and 26th out of 63 in Poland as of 2020.

New Street Additions (2006–2020)

SNDi value
3.31
Rank in Poland
32nd of 63
Rank in Wielkopolskie
3rd of 6

Entire Network (Aggregate)

SNDi value
2.23
Rank in Poland
26th of 63
Rank in Wielkopolskie
2nd of 6

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

What about similarly populated cities?

1.82.73.64.5<19751976–19901991–20052006–2020SNDi of street additions
1.82.73.64.5<19751976–19901991–20052006–2020SNDi of entire street network
PoznanTirupatiAtlanta

While Tirupati and Atlanta both fluctuated in its street-construction patterns, Poznan built increasingly disconnected streets over time in new street additions. For the full street network, though, all three cities follow the same trend. Poznan and Tirupati have been growing further apart in their street-network character since 1975.