Angoulême in context: Street-network sprawl trends

Angouleme in context

2.533.54<19751976–19901991–20052006–2020SNDi of street additions
2.533.54<19751976–19901991–20052006–2020SNDi of entire street network
AngoulemeNouvelle-Aquitaine (Region)France (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Angoulême plotted against Nouvelle-Aquitaine and France. While Nouvelle-Aquitaine and France both peaked in 1991-2005, Angoulême's new street additions peaked in 1991-2005. Most recently, Angoulême's incremental SNDi fell from 4.08 to 4.07 between 1991-2005 and 2006-2020. In terms of the aggregate network, Angoulême ranked 5th out of 7 cities in Nouvelle-Aquitaine and 42nd out of 73 in France as of 2020.

New Street Additions (2006–2020)

SNDi value
4.07
Rank in France
57th of 73
Rank in Nouvelle-Aquitaine
7th of 7

Entire Network (Aggregate)

SNDi value
2.66
Rank in France
42nd of 73
Rank in Nouvelle-Aquitaine
5th of 7

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

What about similarly populated cities?

12345<19751976–19901991–20052006–2020SNDi of street additions
12345<19751976–19901991–20052006–2020SNDi of entire street network
AngoulemeJutiapaQinglong

While Jutiapa and Qinglong both built increasingly disconnected streets over time, Angoulême built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full street network, though, all three cities follow the same trend. Notably, Angoulême had a more sprawly network than Qinglong in 1975 but the two have since reversed their relative ranking.