Dormagen in context: Street-network sprawl trends

Dormagen in context

2.42.733.3<19751976–19901991–20052006–2020SNDi of street additions
2.42.733.3<19751976–19901991–20052006–2020SNDi of entire street network
DormagenNordrhein-Westfalen (Region)Germany (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Dormagen plotted against Nordrhein-Westfalen and Germany. The SNDi of new construction in Dormagen followed a zig-zag trend with an overall decrease, compared to Nordrhein-Westfalen which rose steadily and Germany which rose steadily. Most recently, Dormagen's incremental SNDi fell from 3.12 to 2.97 between 1991-2005 and 2006-2020. In terms of the aggregate network, Dormagen ranked 23rd out of 24 cities in Nordrhein-Westfalen and 94th out of 99 in Germany as of 2020.

New Street Additions (2006–2020)

SNDi value
2.97
Rank in Germany
59th of 99
Rank in Nordrhein-Westfalen
15th of 24

Entire Network (Aggregate)

SNDi value
3.0
Rank in Germany
94th of 99
Rank in Nordrhein-Westfalen
23rd of 24

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

What about similarly populated cities?

1234<19751976–19901991–20052006–2020SNDi of street additions
1234<19751976–19901991–20052006–2020SNDi of entire street network
DormagenGobaVwawa

While Goba and Vwawa both built increasingly disconnected streets over time, Dormagen fluctuated in its street-construction patterns in new street additions. Looking at the full network, Goba and Vwawa both became progressively more disconnected, while Dormagen fluctuated in connectivity. Notably, Dormagen had a more sprawly network than Vwawa in 1975 but the two have since reversed their relative ranking.