Marignane in context: Street-network sprawl trends

Marignane in context

34567<19751976–19901991–20052006–2020SNDi of street additions
34567<19751976–19901991–20052006–2020SNDi of entire street network
MarignaneProvence-Alpes-Cote d'Azur (Region)France (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Marignane plotted against Provence-Alpes-Côte d'Azur and France. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Marignane's incremental SNDi fell from 6.69 to 6.17 between 1991-2005 and 2006-2020. In terms of the aggregate network, Marignane ranked 7th out of 7 cities in Provence-Alpes-Côte d'Azur and 73rd out of 73 in France as of 2020.

New Street Additions (2006–2020)

SNDi value
6.17
Rank in France
70th of 73
Rank in Provence-Alpes-Côte d'Azur
5th of 7

Entire Network (Aggregate)

SNDi value
4.81
Rank in France
73rd of 73
Rank in Provence-Alpes-Côte d'Azur
7th of 7

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
MarignaneDukkuNarail

In new street additions, Marignane built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Dukku fluctuated in its street-construction patterns and Narail fluctuated in its street-construction patterns. Looking at the full network, Dukku and Narail both fluctuated in connectivity, while Marignane became progressively more disconnected. Notably, Marignane had a more connected network than Narail in 1975 but the two have since reversed their relative ranking.