Aachen in context: Street-network sprawl trends
Aachen in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Aachen plotted against Nordrhein-Westfalen and Germany. The SNDi of new construction in Aachen peaked in 1991-2005, compared to Nordrhein-Westfalen which rose steadily and Germany which rose steadily. Most recently, Aachen's incremental SNDi fell from 2.75 to 2.56 between 1991-2005 and 2006-2020. In terms of the aggregate network, Aachen ranked 5th out of 24 cities in Nordrhein-Westfalen and 41st out of 99 in Germany as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 2.56
- Rank in Germany
- 41st of 99
- Rank in Nordrhein-Westfalen
- 10th of 24
Entire Network (Aggregate)
- SNDi value
- 1.91
- Rank in Germany
- 41st of 99
- Rank in Nordrhein-Westfalen
- 5th of 24
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
- Yanping, China
- Diourbel, Senegal
- Шелепино, Russia
- Gondanglegi, Indonesia
- Binyang, China
- Kostanay, Kazakhstan
In new street additions, Aachen and Yanping both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Gondanglegi built increasingly disconnected streets over time. For the full network, Aachen and Gondanglegi both became progressively more disconnected, while Yanping grew more disconnected from 1975 through 1991-2005, then improved.