Hanover in context: Street-network sprawl trends

Hanover in context

1.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
HanoverNiedersachsen (Region)Germany (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Hanover plotted against Niedersachsen and Germany. The SNDi of new construction in Hanover followed a zig-zag trend with an overall increase, compared to Niedersachsen which rose steadily and Germany which rose steadily. Most recently, Hanover's incremental SNDi rose from 2.29 to 3.85 between 1991-2005 and 2006-2020. In terms of the aggregate network, Hanover ranked 7th out of 9 cities in Niedersachsen and 64th out of 99 in Germany as of 2020.

New Street Additions (2006–2020)

SNDi value
3.85
Rank in Germany
88th of 99
Rank in Niedersachsen
9th of 9

Entire Network (Aggregate)

SNDi value
2.09
Rank in Germany
64th of 99
Rank in Niedersachsen
7th of 9

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

What about similarly populated cities?

1.82.433.6<19751976–19901991–20052006–2020SNDi of street additions
1.82.433.6<19751976–19901991–20052006–2020SNDi of entire street network
HanoverDuhokJincheng

In new street additions, Duhok and Jincheng both built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Hanover fluctuated in street-construction patterns. For the full street network, though, all three cities follow the same trend. Hanover and Duhok have been growing further apart in their street-network character since 1975.