Gdynia in context: Street-network sprawl trends

Gdynia in context

2.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
2.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
GdyniaPomorskie (Region)Poland (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Gdynia plotted against Pomorskie and Poland. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Gdynia's incremental SNDi rose from 3.46 to 3.81 between 1991-2005 and 2006-2020. In terms of the aggregate network, Gdynia ranked 4th out of 6 cities in Pomorskie and 47th out of 63 in Poland as of 2020.

New Street Additions (2006–2020)

SNDi value
3.81
Rank in Poland
44th of 63
Rank in Pomorskie
5th of 6

Entire Network (Aggregate)

SNDi value
2.61
Rank in Poland
47th of 63
Rank in Pomorskie
4th of 6

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

What about similarly populated cities?

1.42.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
1.42.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
GdyniaNavoiyDes Moines

Gdynia, Navoiy, and Des Moines all built increasingly disconnected streets over time in new street construction. The same pattern holds for the full street network.