Graz in context: Street-network sprawl trends

Graz 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
GrazSteiermark (Region)Austria (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Graz plotted against Steiermark and Austria. The SNDi of new construction in Graz followed a zig-zag trend with an overall increase, compared to Steiermark which followed a zig-zag trend with an overall increase and Austria which rose steadily. Most recently, Graz's incremental SNDi rose from 3.87 to 4.44 between 1991-2005 and 2006-2020. In terms of the aggregate network, Graz ranked 1st out of 1 cities in Steiermark and 8th out of 8 in Austria as of 2020.

New Street Additions (2006–2020)

SNDi value
4.44
Rank in Austria
8th of 8
Rank in Steiermark
1st of 1

Entire Network (Aggregate)

SNDi value
2.74
Rank in Austria
8th of 8
Rank in Steiermark
1st of 1

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

What about similarly populated cities?

2.43.24<19751976–19901991–20052006–2020SNDi of street additions
2.43.24<19751976–19901991–20052006–2020SNDi of entire street network
GrazBenipurA Coruna

In new street additions, Graz fluctuated in its street-construction patterns, while Benipur built increasingly disconnected streets over time and A Coruña built increasingly disconnected streets from 1975 through 1976-1990, then improved. For the full street network, though, all three cities follow the same trend. Graz and A Coruña have been growing further apart in their street-network character since 1975.