Saarbruecken in context: Street-network sprawl trends

Saarbruecken in context

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
SaarbrueckenSaarland (Region)Germany (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Saarbruecken plotted against Saarland and Germany. The SNDi of new construction in Saarbruecken peaked in 1991-2005, compared to Saarland which rose steadily and Germany which rose steadily. Most recently, Saarbruecken's incremental SNDi fell from 3.67 to 2.57 between 1991-2005 and 2006-2020. In terms of the aggregate network, Saarbruecken ranked 1st out of 1 cities in Saarland and 77th out of 99 in Germany as of 2020.

New Street Additions (2006–2020)

SNDi value
2.57
Rank in Germany
42nd of 99
Rank in Saarland
1st of 1

Entire Network (Aggregate)

SNDi value
2.32
Rank in Germany
77th of 99
Rank in Saarland
1st of 1

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

What about similarly populated cities?

1.62.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
SaarbrueckenKonsoUruguaiana

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