Arras in context: Street-network sprawl trends

Arras in context

2.12.83.54.2<19751976–19901991–20052006–2020SNDi of street additions
2.12.83.54.2<19751976–19901991–20052006–2020SNDi of entire street network
ArrasHauts-de-France (Region)France (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Arras plotted against Hauts-de-France and France. The SNDi of new construction in Arras rose steadily, compared to Hauts-de-France which peaked in 1991-2005 and France which peaked in 1991-2005. Most recently, Arras's incremental SNDi rose from 2.9 to 3.1 between 1991-2005 and 2006-2020. In terms of the aggregate network, Arras ranked 1st out of 10 cities in Hauts-de-France and 5th out of 73 in France as of 2020.

New Street Additions (2006–2020)

SNDi value
3.1
Rank in France
31st of 73
Rank in Hauts-de-France
3rd of 10

Entire Network (Aggregate)

SNDi value
2.01
Rank in France
5th of 73
Rank in Hauts-de-France
1st of 10

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

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
ArrasDaugavpilsHisua

In new street additions, Arras built increasingly disconnected streets over time, while Daugavpils built increasingly connected streets over time and Hisua fluctuated in street-construction patterns. For the full network, Arras became progressively more disconnected, while Daugavpils became progressively more connected and Hisua became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards. Arras and Daugavpils have been converging in their street-network character since 1975.