Rumia in context: Street-network sprawl trends

Rumia 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
RumiaPomorskie (Region)Poland (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Rumia plotted against Pomorskie and Poland. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Rumia's incremental SNDi rose from 2.99 to 3.46 between 1991-2005 and 2006-2020. In terms of the aggregate network, Rumia ranked 3rd out of 6 cities in Pomorskie and 24th out of 63 in Poland as of 2020.

New Street Additions (2006–2020)

SNDi value
3.46
Rank in Poland
39th of 63
Rank in Pomorskie
3rd of 6

Entire Network (Aggregate)

SNDi value
2.16
Rank in Poland
24th of 63
Rank in Pomorskie
3rd of 6

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
RumiaLalianShewa

In new street additions, Rumia built increasingly disconnected streets over time, while Lalian built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns and Shewa fluctuated in its street-construction patterns. For the full network, Rumia became progressively more disconnected, while Lalian became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards and Shewa fluctuated in connectivity. Rumia and Lalian have been converging in their street-network character since 1975.