Angers in context: Street-network sprawl trends

Angers 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
AngersPays de la Loire (Region)France (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Angers plotted against Pays de la Loire and France. The SNDi of new construction in Angers peaked in 1976-1990, compared to Pays de la Loire which peaked in 1991-2005 and France which peaked in 1991-2005. Most recently, Angers's incremental SNDi fell from 2.65 to 2.17 between 1991-2005 and 2006-2020. In terms of the aggregate network, Angers ranked 3rd out of 4 cities in Pays de la Loire and 24th out of 73 in France as of 2020.

New Street Additions (2006–2020)

SNDi value
2.17
Rank in France
5th of 73
Rank in Pays de la Loire
2nd of 4

Entire Network (Aggregate)

SNDi value
2.34
Rank in France
24th of 73
Rank in Pays de la Loire
3rd of 4

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

What about similarly populated cities?

11.522.53<19751976–19901991–20052006–2020SNDi of street additions
11.522.53<19751976–19901991–20052006–2020SNDi of entire street network
AngersSan LuisZhenping

While San Luis and Zhenping both fluctuated in its street-construction patterns, Angers built increasingly disconnected streets from 1975 through 1976-1990, then improved in new street additions. For the full network, Angers grew more disconnected from 1975 through 1991-2005, then improved, while San Luis fluctuated in connectivity and Zhenping became progressively more disconnected. Angers and Zhenping have been converging in their street-network character since 1975.