Gdansk in context: Street-network sprawl trends

Gdansk in context

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
GdanskPomorskie (Region)Poland (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Gdansk plotted against Pomorskie and Poland. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Gdansk's incremental SNDi rose from 2.49 to 3.15 between 1991-2005 and 2006-2020. In terms of the aggregate network, Gdansk ranked 1st out of 6 cities in Pomorskie and 13th out of 63 in Poland as of 2020.

New Street Additions (2006–2020)

SNDi value
3.15
Rank in Poland
29th of 63
Rank in Pomorskie
2nd of 6

Entire Network (Aggregate)

SNDi value
1.98
Rank in Poland
13th of 63
Rank in Pomorskie
1st of 6

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

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
GdanskNumazuLiling

In new street additions, Gdansk built increasingly disconnected streets over time, while Numazu fluctuated in its street-construction patterns and Liling built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Gdansk and Numazu both became progressively more disconnected, while Liling grew more disconnected from 1975 through 1976-1990, then improved.