Ravenna in context: Street-network sprawl trends

Ravenna 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
RavennaEmilia-Romagna (Region)Italy (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ravenna plotted against Emilia-Romagna and Italy. The SNDi of new construction in Ravenna followed a zig-zag trend with an overall increase, compared to Emilia-Romagna which peaked in 1991-2005 and Italy which peaked in 1991-2005. Most recently, Ravenna's incremental SNDi rose from 2.14 to 2.79 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ravenna ranked 3rd out of 10 cities in Emilia-Romagna and 21st out of 88 in Italy as of 2020.

New Street Additions (2006–2020)

SNDi value
2.79
Rank in Italy
17th of 88
Rank in Emilia-Romagna
3rd of 10

Entire Network (Aggregate)

SNDi value
2.16
Rank in Italy
21st of 88
Rank in Emilia-Romagna
3rd of 10

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

What about similarly populated cities?

123456<19751976–19901991–20052006–2020SNDi of street additions
123456<19751976–19901991–20052006–2020SNDi of entire street network
RavennaArasikereLiuhe

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