Piacenza in context: Street-network sprawl trends

Piacenza 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
PiacenzaEmilia-Romagna (Region)Italy (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Piacenza plotted against Emilia-Romagna and Italy. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Piacenza's incremental SNDi fell from 2.75 to 2.28 between 1991-2005 and 2006-2020. In terms of the aggregate network, Piacenza ranked 2nd out of 10 cities in Emilia-Romagna and 18th out of 88 in Italy as of 2020.

New Street Additions (2006–2020)

SNDi value
2.28
Rank in Italy
8th of 88
Rank in Emilia-Romagna
1st of 10

Entire Network (Aggregate)

SNDi value
2.12
Rank in Italy
18th of 88
Rank in Emilia-Romagna
2nd of 10

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

What about similarly populated cities?

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
PiacenzaCratoAkkaraipattu

In new street additions, Piacenza and Akkaraipattu both built increasingly disconnected streets from 1975 through 1991-2005, then improved, while Crato fluctuated in its street-construction patterns. Looking at the full network, Crato and Akkaraipattu both became progressively more disconnected, while Piacenza grew more disconnected from 1975 through 1991-2005, then improved. Notably, Piacenza had a more sprawly network than Crato in 1975 but the two have since reversed their relative ranking.