Iserlohn in context: Street-network sprawl trends

Iserlohn in context

2.433.6<19751976–19901991–20052006–2020SNDi of street additions
2.433.6<19751976–19901991–20052006–2020SNDi of entire street network
IserlohnNordrhein-Westfalen (Region)Germany (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Iserlohn plotted against Nordrhein-Westfalen and Germany. The SNDi of new construction in Iserlohn peaked in 1991-2005, compared to Nordrhein-Westfalen which rose steadily and Germany which rose steadily. Most recently, Iserlohn's incremental SNDi fell from 3.96 to 3.38 between 1991-2005 and 2006-2020. In terms of the aggregate network, Iserlohn ranked 20th out of 24 cities in Nordrhein-Westfalen and 89th out of 99 in Germany as of 2020.

New Street Additions (2006–2020)

SNDi value
3.38
Rank in Germany
80th of 99
Rank in Nordrhein-Westfalen
20th of 24

Entire Network (Aggregate)

SNDi value
2.62
Rank in Germany
89th of 99
Rank in Nordrhein-Westfalen
20th of 24

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

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
IserlohnFazenda CastroDawa

While Fazenda Castro and Dawa both fluctuated in its street-construction patterns, Iserlohn built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full network, Iserlohn and Fazenda Castro both became progressively more disconnected, while Dawa fluctuated in connectivity. Iserlohn and Dawa have been growing further apart in their street-network character since 1975.