Gera in context: Street-network sprawl trends

Gera in context

1.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
GeraThuringen (Region)Germany (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Gera plotted against Thüringen and Germany. The SNDi of new construction in Gera peaked in 1991-2005, compared to Thüringen which rose steadily and Germany which rose steadily. Most recently, Gera's incremental SNDi fell from 3.74 to 2.96 between 1991-2005 and 2006-2020. In terms of the aggregate network, Gera ranked 3rd out of 3 cities in Thüringen and 42nd out of 99 in Germany as of 2020.

New Street Additions (2006–2020)

SNDi value
2.96
Rank in Germany
57th of 99
Rank in Thüringen
3rd of 3

Entire Network (Aggregate)

SNDi value
1.91
Rank in Germany
42nd of 99
Rank in Thüringen
3rd of 3

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

What about similarly populated cities?

0.91.82.73.6<19751976–19901991–20052006–2020SNDi of street additions
0.91.82.73.6<19751976–19901991–20052006–2020SNDi of entire street network
GeraBandaAguachica

In new street additions, Gera built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Banda built increasingly disconnected streets over time and Aguachica fluctuated in its street-construction patterns. For the full network, Gera and Banda both became progressively more disconnected, while Aguachica fluctuated in connectivity. Gera and Banda have been converging in their street-network character since 1975.