Clermont-Ferrand in context: Street-network sprawl trends

Clermont-Ferrand 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
Clermont-FerrandAuvergne-Rhone-Alpes (Region)France (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Clermont-Ferrand plotted against Auvergne-Rhône-Alpes and France. The SNDi of new construction in Clermont-Ferrand peaked in 1976-1990, compared to Auvergne-Rhône-Alpes which peaked in 1991-2005 and France which peaked in 1991-2005. Most recently, Clermont-Ferrand's incremental SNDi fell from 3.61 to 3.33 between 1991-2005 and 2006-2020. In terms of the aggregate network, Clermont-Ferrand ranked 2nd out of 8 cities in Auvergne-Rhône-Alpes and 37th out of 73 in France as of 2020.

New Street Additions (2006–2020)

SNDi value
3.33
Rank in France
43rd of 73
Rank in Auvergne-Rhône-Alpes
2nd of 8

Entire Network (Aggregate)

SNDi value
2.58
Rank in France
37th of 73
Rank in Auvergne-Rhône-Alpes
2nd of 8

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

What about similarly populated cities?

1234<19751976–19901991–20052006–2020SNDi of street additions
1234<19751976–19901991–20052006–2020SNDi of entire street network
Clermont-FerrandLakhisaraiAbu Kabir

In new street additions, Clermont-Ferrand built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Lakhisarai fluctuated in its street-construction patterns and Abu Kabir built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Clermont-Ferrand and Abu Kabir both became progressively more disconnected, while Lakhisarai grew more disconnected from 1975 through 1976-1990, then improved. Clermont-Ferrand and Lakhisarai have been converging in their street-network character since 1975.