Palermo in context: Street-network sprawl trends
Palermo in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Palermo plotted against Sicily and Italy. While Sicily and Italy both peaked in 1991-2005, Palermo's new street additions peaked in 1991-2005. Most recently, Palermo's incremental SNDi fell from 5.52 to 5.41 between 1991-2005 and 2006-2020. In terms of the aggregate network, Palermo ranked 6th out of 8 cities in Sicily and 55th out of 88 in Italy as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 5.41
- Rank in Italy
- 80th of 88
- Rank in Sicily
- 5th of 8
Entire Network (Aggregate)
- SNDi value
- 3.08
- Rank in Italy
- 55th of 88
- Rank in Sicily
- 6th of 8
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
- Kisangani, Democratic Republic of the Congo
- Nampula, Mozambique
- Patiala, India
- Seville, Spain
- Puyang, China
- Donghe, China
In new street additions, Kisangani and Seville both fluctuated in street-construction patterns, while Palermo built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend.