Lille in context: Street-network sprawl trends

Lille in context

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

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Lille plotted against Hauts-de-France and France. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Lille's incremental SNDi fell from 3.74 to 3.21 between 1991-2005 and 2006-2020. In terms of the aggregate network, Lille ranked 7th out of 10 cities in Hauts-de-France and 38th out of 73 in France as of 2020.

New Street Additions (2006–2020)

SNDi value
3.21
Rank in France
38th of 73
Rank in Hauts-de-France
4th of 10

Entire Network (Aggregate)

SNDi value
2.6
Rank in France
38th of 73
Rank in Hauts-de-France
7th of 10

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

What about similarly populated cities?

345<19751976–19901991–20052006–2020SNDi of street additions
345<19751976–19901991–20052006–2020SNDi of entire street network
LilleBarquisimetoHuaibei

While Barquisimeto and Huaibei both built increasingly disconnected streets over time, Lille 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. Lille and Barquisimeto have been growing further apart in their street-network character since 1975.