Marl in context: Street-network sprawl trends

Marl in context

22.533.5<19751976–19901991–20052006–2020SNDi of street additions
22.533.5<19751976–19901991–20052006–2020SNDi of entire street network
MarlNordrhein-Westfalen (Region)Germany (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Marl plotted against Nordrhein-Westfalen and Germany. The SNDi of new construction in Marl peaked in 1976-1990, compared to Nordrhein-Westfalen which rose steadily and Germany which rose steadily. Most recently, Marl's incremental SNDi fell from 2.13 to 1.72 between 1991-2005 and 2006-2020. In terms of the aggregate network, Marl ranked 7th out of 24 cities in Nordrhein-Westfalen and 52nd out of 99 in Germany as of 2020.

New Street Additions (2006–2020)

SNDi value
1.72
Rank in Germany
4th of 99
Rank in Nordrhein-Westfalen
1st of 24

Entire Network (Aggregate)

SNDi value
1.98
Rank in Germany
52nd of 99
Rank in Nordrhein-Westfalen
7th of 24

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

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
MarlMadagaliPayshanba

In new street additions, Marl built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Madagali built increasingly disconnected streets over time and Payshanba built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Madagali and Payshanba both became progressively more disconnected, while Marl grew more disconnected from 1975 through 1991-2005, then improved. Marl and Madagali have been growing further apart in their street-network character since 1975.