Darmstadt in context: Street-network sprawl trends

Darmstadt in context

1.42.12.83.5<19751976–19901991–20052006–2020SNDi of street additions
1.42.12.83.5<19751976–19901991–20052006–2020SNDi of entire street network
DarmstadtHessen (Region)Germany (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Darmstadt plotted against Hessen and Germany. The SNDi of new construction in Darmstadt peaked in 1991-2005, compared to Hessen which peaked in 1991-2005 and Germany which rose steadily. Most recently, Darmstadt's incremental SNDi fell from 1.5 to 1.18 between 1991-2005 and 2006-2020. In terms of the aggregate network, Darmstadt ranked 1st out of 8 cities in Hessen and 1st out of 99 in Germany as of 2020.

New Street Additions (2006–2020)

SNDi value
1.18
Rank in Germany
1st of 99
Rank in Hessen
1st of 8

Entire Network (Aggregate)

SNDi value
1.17
Rank in Germany
1st of 99
Rank in Hessen
1st of 8

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

What about similarly populated cities?

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
DarmstadtIkomKlaipeda

While Ikom and Klaipėda both built increasingly disconnected streets over time, Darmstadt built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. Looking at the full network, Ikom and Klaipėda both became progressively more disconnected, while Darmstadt grew more disconnected from 1975 through 1991-2005, then improved. Darmstadt and Ikom have been growing further apart in their street-network character since 1975.