Unna in context: Street-network sprawl trends

Unna in context

2.42.733.3<19751976–19901991–20052006–2020SNDi of street additions
2.42.733.3<19751976–19901991–20052006–2020SNDi of entire street network
UnnaNordrhein-Westfalen (Region)Germany (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Unna plotted against Nordrhein-Westfalen and Germany. The SNDi of new construction in Unna peaked in 1991-2005, compared to Nordrhein-Westfalen which rose steadily and Germany which rose steadily. Most recently, Unna's incremental SNDi fell from 3.29 to 2.67 between 1991-2005 and 2006-2020. In terms of the aggregate network, Unna ranked 19th out of 24 cities in Nordrhein-Westfalen and 88th out of 99 in Germany as of 2020.

New Street Additions (2006–2020)

SNDi value
2.67
Rank in Germany
46th of 99
Rank in Nordrhein-Westfalen
11th of 24

Entire Network (Aggregate)

SNDi value
2.57
Rank in Germany
88th of 99
Rank in Nordrhein-Westfalen
19th of 24

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

What about similarly populated cities?

345<19751976–19901991–20052006–2020SNDi of street additions
345<19751976–19901991–20052006–2020SNDi of entire street network
UnnaWeiheSalha

In new street additions, Unna built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Weihe built increasingly disconnected streets from 1975 through 1976-1990, then improved and Salha fluctuated in its street-construction patterns. For the full network, Unna became progressively more disconnected, while Weihe grew more disconnected from 1975 through 1991-2005, then improved and Salha grew more disconnected from 1975 through 1976-1990, then improved. Unna and Weihe have been growing further apart in their street-network character since 1975.