Metz in context: Street-network sprawl trends

Metz in context

2.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
2.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
MetzGrand Est (Region)France (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Metz plotted against Grand Est and France. The SNDi of new construction in Metz peaked in 1976-1990, compared to Grand Est which rose steadily and France which peaked in 1991-2005. Most recently, Metz's incremental SNDi fell from 2.58 to 2.23 between 1991-2005 and 2006-2020. In terms of the aggregate network, Metz ranked 2nd out of 7 cities in Grand Est and 14th out of 73 in France as of 2020.

New Street Additions (2006–2020)

SNDi value
2.23
Rank in France
7th of 73
Rank in Grand Est
1st of 7

Entire Network (Aggregate)

SNDi value
2.2
Rank in France
14th of 73
Rank in Grand Est
2nd of 7

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

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
MetzGaddanakeri TandaBangkinang

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