Aarau in context: Street-network sprawl trends

Aarau in context

2.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
AarauAargau (Region)Switzerland (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Aarau plotted against Aargau and Switzerland. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Aarau's incremental SNDi rose from 2.96 to 2.97 between 1991-2005 and 2006-2020. In terms of the aggregate network, Aarau ranked 1st out of 3 cities in Aargau and 4th out of 17 in Switzerland as of 2020.

New Street Additions (2006–2020)

SNDi value
2.97
Rank in Switzerland
9th of 17
Rank in Aargau
2nd of 3

Entire Network (Aggregate)

SNDi value
1.92
Rank in Switzerland
4th of 17
Rank in Aargau
1st of 3

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

What about similarly populated cities?

2.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
AarauDorahaZharkent

In new street additions, Aarau built increasingly disconnected streets over time, while Doraha built increasingly disconnected streets from 1975 through 1991-2005, then improved and Zharkent built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Aarau and Doraha both became progressively more disconnected, while Zharkent grew more disconnected from 1975 through 1976-1990, then improved.