Vigo in context: Street-network sprawl trends

Vigo in context

2.43.244.8<19751976–19901991–20052006–2020SNDi of street additions
2.43.244.8<19751976–19901991–20052006–2020SNDi of entire street network
VigoGalicia (Region)Spain (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Vigo plotted against Galicia and Spain. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Vigo's incremental SNDi fell from 4.17 to 3.63 between 1991-2005 and 2006-2020. In terms of the aggregate network, Vigo ranked 4th out of 4 cities in Galicia and 83rd out of 85 in Spain as of 2020.

New Street Additions (2006–2020)

SNDi value
3.63
Rank in Spain
72nd of 85
Rank in Galicia
3rd of 4

Entire Network (Aggregate)

SNDi value
3.7
Rank in Spain
83rd of 85
Rank in Galicia
4th of 4

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

What about similarly populated cities?

2345<19751976–19901991–20052006–2020SNDi of street additions
2345<19751976–19901991–20052006–2020SNDi of entire street network
VigoYa'anKeren

In new street additions, Vigo built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Ya'an fluctuated in its street-construction patterns and Keren built increasingly disconnected streets over time. Looking at the full network, Ya'an and Keren both became progressively more disconnected, while Vigo grew more disconnected from 1975 through 1991-2005, then improved. Vigo and Ya'an have been converging in their street-network character since 1975.