Erfurt in context: Street-network sprawl trends

Erfurt in context

1.82.43<19751976–19901991–20052006–2020SNDi of street additions
1.82.43<19751976–19901991–20052006–2020SNDi of entire street network
ErfurtThuringen (Region)Germany (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Erfurt plotted against Thüringen and Germany. The SNDi of new construction in Erfurt peaked in 1991-2005, compared to Thüringen which rose steadily and Germany which rose steadily. Most recently, Erfurt's incremental SNDi fell from 2.45 to 2.15 between 1991-2005 and 2006-2020. In terms of the aggregate network, Erfurt ranked 1st out of 3 cities in Thüringen and 13th out of 99 in Germany as of 2020.

New Street Additions (2006–2020)

SNDi value
2.15
Rank in Germany
16th of 99
Rank in Thüringen
1st of 3

Entire Network (Aggregate)

SNDi value
1.65
Rank in Germany
13th of 99
Rank in Thüringen
1st of 3

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
ErfurtSaseboChamagram

In new street additions, Erfurt and Chamagram both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Sasebo fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Erfurt and Chamagram have been growing further apart in their street-network character since 1975.