Heidelberg in context: Street-network sprawl trends
Heidelberg in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Heidelberg plotted against Baden-Württemberg and Germany. The SNDi of new construction in Heidelberg peaked in 1991-2005, compared to Baden-Württemberg which followed a zig-zag trend with an overall increase and Germany which rose steadily. Most recently, Heidelberg's incremental SNDi fell from 2.68 to 2.35 between 1991-2005 and 2006-2020. In terms of the aggregate network, Heidelberg ranked 11th out of 15 cities in Baden-Württemberg and 51st out of 99 in Germany as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 2.35
- Rank in Germany
- 25th of 99
- Rank in Baden-Württemberg
- 6th of 15
Entire Network (Aggregate)
- SNDi value
- 1.97
- Rank in Germany
- 51st of 99
- Rank in Baden-Württemberg
- 11th of 15
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
Heidelberg, Hejian, and Kurgan all built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street construction. For the full network, Heidelberg and Kurgan both became progressively more disconnected, while Hejian grew more disconnected from 1975 through 1991-2005, then improved.