Tychy in context: Street-network sprawl trends

Tychy in context

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
TychySlaskie (Region)Poland (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Tychy plotted against Śląskie and Poland. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Tychy's incremental SNDi rose from 3.45 to 4.22 between 1991-2005 and 2006-2020. In terms of the aggregate network, Tychy ranked 4th out of 8 cities in Śląskie and 53rd out of 63 in Poland as of 2020.

New Street Additions (2006–2020)

SNDi value
4.22
Rank in Poland
51st of 63
Rank in Śląskie
4th of 8

Entire Network (Aggregate)

SNDi value
2.73
Rank in Poland
53rd of 63
Rank in Śląskie
4th of 8

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
TychyTundumaSinop

In new street additions, Tychy and Tunduma both built increasingly disconnected streets over time, while Sinop fluctuated in its street-construction patterns. For the full network, Tychy and Tunduma both became progressively more disconnected, while Sinop grew more disconnected from 1975 through 1976-1990, then improved. Tychy and Sinop have been growing further apart in their street-network character since 1975.