Bielefeld in context: Street-network sprawl trends

Bielefeld in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Bielefeld plotted against Nordrhein-Westfalen and Germany. The SNDi of new construction in Bielefeld followed a zig-zag trend with an overall increase, compared to Nordrhein-Westfalen which rose steadily and Germany which rose steadily. Most recently, Bielefeld's incremental SNDi rose from 2.13 to 2.39 between 1991-2005 and 2006-2020. In terms of the aggregate network, Bielefeld ranked 1st out of 24 cities in Nordrhein-Westfalen and 17th out of 99 in Germany as of 2020.

New Street Additions (2006–2020)

SNDi value
2.39
Rank in Germany
30th of 99
Rank in Nordrhein-Westfalen
6th of 24

Entire Network (Aggregate)

SNDi value
1.72
Rank in Germany
17th of 99
Rank in Nordrhein-Westfalen
1st of 24

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

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
BielefeldKuantanCergy

While Kuantan and Cergy both built increasingly disconnected streets over time, Bielefeld fluctuated in its street-construction patterns in new street additions. For the full street network, though, all three cities follow the same trend.