Olten in context: Street-network sprawl trends

Olten in context

2.533.54<19751976–19901991–20052006–2020SNDi of street additions
2.533.54<19751976–19901991–20052006–2020SNDi of entire street network
OltenAargau (Region)Switzerland (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Olten plotted against Aargau and Switzerland. The SNDi of new construction in Olten peaked in 1991-2005, compared to Aargau which rose steadily and Switzerland which rose steadily. Most recently, Olten's incremental SNDi fell from 3.52 to 2.72 between 1991-2005 and 2006-2020. In terms of the aggregate network, Olten ranked 3rd out of 3 cities in Aargau and 12th out of 17 in Switzerland as of 2020.

New Street Additions (2006–2020)

SNDi value
2.72
Rank in Switzerland
7th of 17
Rank in Aargau
1st of 3

Entire Network (Aggregate)

SNDi value
2.51
Rank in Switzerland
12th of 17
Rank in Aargau
3rd of 3

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
OltenSondaliaPerbaungan

In new street additions, Olten built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Sondalia built increasingly disconnected streets from 1975 through 1976-1990, then improved and Perbaungan fluctuated in its street-construction patterns. Looking at the full network, Sondalia and Perbaungan both grew more disconnected from 1975 through 1976-1990, then improved, while Olten became progressively more disconnected.