Troyes in context: Street-network sprawl trends

Troyes in context

2.533.54<19751976–19901991–20052006–2020SNDi of street additions
2.533.54<19751976–19901991–20052006–2020SNDi of entire street network
TroyesGrand Est (Region)France (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Troyes plotted against Grand Est and France. While Grand Est and France both peaked in 1991-2005, Troyes's new street additions peaked in 1991-2005. Most recently, Troyes's incremental SNDi fell from 3.58 to 3.26 between 1991-2005 and 2006-2020. In terms of the aggregate network, Troyes ranked 7th out of 7 cities in Grand Est and 34th out of 73 in France as of 2020.

New Street Additions (2006–2020)

SNDi value
3.26
Rank in France
41st of 73
Rank in Grand Est
6th of 7

Entire Network (Aggregate)

SNDi value
2.47
Rank in France
34th of 73
Rank in Grand Est
7th of 7

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

What about similarly populated cities?

246810<19751976–19901991–20052006–2020SNDi of street additions
246810<19751976–19901991–20052006–2020SNDi of entire street network
TroyesTenkasiPapeete

In new street additions, Troyes built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Tenkasi built increasingly disconnected streets over time and Papeete fluctuated in its street-construction patterns. For the full street network, though, all three cities follow the same trend. Troyes and Tenkasi have been growing further apart in their street-network character since 1975.