Grenoble in context: Street-network sprawl trends

Grenoble 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
GrenobleAuvergne-Rhone-Alpes (Region)France (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Grenoble plotted against Auvergne-Rhône-Alpes and France. The SNDi of new construction in Grenoble followed a zig-zag trend with an overall increase, compared to Auvergne-Rhône-Alpes which peaked in 1991-2005 and France which peaked in 1991-2005. Most recently, Grenoble's incremental SNDi rose from 3.65 to 3.96 between 1991-2005 and 2006-2020. In terms of the aggregate network, Grenoble ranked 3rd out of 8 cities in Auvergne-Rhône-Alpes and 43rd out of 73 in France as of 2020.

New Street Additions (2006–2020)

SNDi value
3.96
Rank in France
56th of 73
Rank in Auvergne-Rhône-Alpes
5th of 8

Entire Network (Aggregate)

SNDi value
2.66
Rank in France
43rd of 73
Rank in Auvergne-Rhône-Alpes
3rd of 8

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

What about similarly populated cities?

0.91.82.73.6<19751976–19901991–20052006–2020SNDi of street additions
0.91.82.73.6<19751976–19901991–20052006–2020SNDi of entire street network
GrenobleSanta FeLinhai

In new street additions, Grenoble and Linhai both fluctuated in its street-construction patterns, while Santa Fe built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full network, Grenoble and Santa Fe both became progressively more disconnected, while Linhai fluctuated in connectivity. Notably, Grenoble had a more sprawly network than Linhai in 1975 but the two have since reversed their relative ranking.