Amiens in context: Street-network sprawl trends

Amiens 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
AmiensHauts-de-France (Region)France (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Amiens 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, Amiens's incremental SNDi fell from 2.54 to 1.71 between 1991-2005 and 2006-2020. In terms of the aggregate network, Amiens ranked 2nd out of 10 cities in Hauts-de-France and 7th out of 73 in France as of 2020.

New Street Additions (2006–2020)

SNDi value
1.71
Rank in France
1st of 73
Rank in Hauts-de-France
1st of 10

Entire Network (Aggregate)

SNDi value
2.1
Rank in France
7th of 73
Rank in Hauts-de-France
2nd of 10

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
AmiensDomaSirkazhi

In new street additions, Amiens built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Doma fluctuated in its street-construction patterns and Sirkazhi built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Amiens grew more disconnected from 1975 through 1991-2005, then improved, while Doma became progressively more disconnected and Sirkazhi became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Amiens and Doma have been converging in their street-network character since 1975.