Poissy in context: Street-network sprawl trends
Poissy in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Poissy plotted against Île-de-France and France. While Île-de-France and France both peaked in 1991-2005, Poissy's new street additions peaked in 1991-2005. Most recently, Poissy's incremental SNDi fell from 4.96 to 3.2 between 1991-2005 and 2006-2020. In terms of the aggregate network, Poissy ranked 8th out of 8 cities in Île-de-France and 66th out of 73 in France as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 3.2
- Rank in France
- 37th of 73
- Rank in Île-de-France
- 6th of 8
Entire Network (Aggregate)
- SNDi value
- 3.42
- Rank in France
- 66th of 73
- Rank in Île-de-France
- 8th of 8
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
While Gaighat and Béja both fluctuated in its street-construction patterns, Poissy built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full network, Poissy grew more disconnected from 1975 through 1991-2005, then improved, while Gaighat fluctuated in connectivity and Béja became progressively more disconnected.