Södertälje in context: Street-network sprawl trends

Sodertalje in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Södertälje plotted against Stockholm and Sweden. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Södertälje's incremental SNDi rose from 3.14 to 3.3 between 1991-2005 and 2006-2020. In terms of the aggregate network, Södertälje ranked 2nd out of 4 cities in Stockholm and 15th out of 17 in Sweden as of 2020.

New Street Additions (2006–2020)

SNDi value
3.3
Rank in Sweden
13th of 17
Rank in Stockholm
2nd of 4

Entire Network (Aggregate)

SNDi value
2.59
Rank in Sweden
15th of 17
Rank in Stockholm
2nd of 4

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

What about similarly populated cities?

1.82.43<19751976–19901991–20052006–2020SNDi of street additions
1.82.43<19751976–19901991–20052006–2020SNDi of entire street network
SodertaljeOssAral

In new street additions, Södertälje built increasingly disconnected streets over time, while Oss fluctuated in its street-construction patterns and Aral built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns. For the full network, Södertälje and Oss both became progressively more disconnected, while Aral became progressively more connected. Notably, Södertälje had a more connected network than Aral in 1975 but the two have since reversed their relative ranking.