Ajaccio in context: Street-network sprawl trends

Ajaccio in context

34567<19751976–19901991–20052006–2020SNDi of street additions
34567<19751976–19901991–20052006–2020SNDi of entire street network
AjaccioCorse (Region)France (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ajaccio plotted against Corse and France. The SNDi of new construction in Ajaccio rose steadily, compared to Corse which rose steadily and France which peaked in 1991-2005. Most recently, Ajaccio's incremental SNDi rose from 6.36 to 6.79 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ajaccio ranked 1st out of 1 cities in Corse and 71st out of 73 in France as of 2020.

New Street Additions (2006–2020)

SNDi value
6.79
Rank in France
72nd of 73
Rank in Corse
1st of 1

Entire Network (Aggregate)

SNDi value
4.32
Rank in France
71st of 73
Rank in Corse
1st of 1

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
AjaccioWatsonvilleWaco

In new street additions, Ajaccio and Waco both built increasingly disconnected streets over time, while Watsonville built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend. Ajaccio and Watsonville have been growing further apart in their street-network character since 1975.