Gießen in context: Street-network sprawl trends

Giessen in context

1.522.533.5<19751976–19901991–20052006–2020SNDi of street additions
1.522.533.5<19751976–19901991–20052006–2020SNDi of entire street network
GiessenHessen (Region)Germany (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Gießen plotted against Hessen and Germany. The SNDi of new construction in Gießen peaked in 1976-1990, compared to Hessen which peaked in 1991-2005 and Germany which rose steadily. Most recently, Gießen's incremental SNDi fell from 1.96 to 1.94 between 1991-2005 and 2006-2020. In terms of the aggregate network, Gießen ranked 3rd out of 8 cities in Hessen and 19th out of 99 in Germany as of 2020.

New Street Additions (2006–2020)

SNDi value
1.94
Rank in Germany
8th of 99
Rank in Hessen
2nd of 8

Entire Network (Aggregate)

SNDi value
1.73
Rank in Germany
19th of 99
Rank in Hessen
3rd of 8

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

What about similarly populated cities?

234567<19751976–19901991–20052006–2020SNDi of street additions
234567<19751976–19901991–20052006–2020SNDi of entire street network
GiessenLos Reyes AcozacVila Jardim

In new street additions, Gießen built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Los Reyes Acozac built increasingly disconnected streets over time and Vila Jardim fluctuated in its street-construction patterns. For the full network, Gießen and Los Reyes Acozac both became progressively more disconnected, while Vila Jardim fluctuated in connectivity. Gießen and Los Reyes Acozac have been growing further apart in their street-network character since 1975.