Street-network Sprawl in Vitoria-Gasteiz, Spain

What is Street-network sprawl?

Street-network Sprawl is a way to measure urban sprawl, worldwide, through the connectedness of the streets. Less sprawl means more connected, more walkable streets. Well-connected streets – like New York City’s grid – are more walkable and can be served by public transit.

The street network is permanent, and its connectivity affects the livability and environmental footprint of cities for decades and centuries to come. In places with more connected streets, residents drive less and walk more. A well-connected street network is associated with better outcomes for health, the environment, sustainable consumption, social integration, and equity.

We can quantify how connected street networks are with the Street Network Disconnectedness Index (SNDi).

SNDi -- our measure of street-network sprawl (disconnectedness)

The SNDi is a comprehensive measurement of “sprawl”. It captures:

A higher SNDi means less-connected streets – i.e., more sprawl. For the 10137 cities in our dataset, the average SNDi is 2.25, with half of the cities' SNDis falling between 1.08 and 3.25.

More information on the sprawl index can be found in these research papers:

To see the state of street-network sprawl across the globe, visit the sprawlmap.

Vitoria-Gasteiz: city in País Vasco, Spain

What exactly constitutes the spatial extent of the city? For these aggregations, we used the Global Human Settlement Layer Urban Center Database (GHS-UCDB) to define the boundaries of the city. These cities -- or urban centers -- cover areas that are densely populated and built-up, and so may extend beyond the spatial borders of these cities that we may be familiar with. The GHS area is shaded in blue.

View Vitoria-Gasteiz, Spain on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Vitoria-Gasteiz as of 2014, the overall level of street-network sprawl is -0.55, which is very well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are -0.69, 0.21, -0.08 and -0.44. Street construction in Vitoria-Gasteiz increased in disconnectivity initially but has since improved. The streets constructed in 1976-1990 were the most disconnected.

Quantity of street network construction: The street network in Vitoria-Gasteiz spans a total of 477 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of -0.69, which is very well-connected.

Effect on the aggregate network: New construction in each period adds to the total stock of streets, but does not change streets that have already been built. Therefore, it has a limited effect on the street network as a whole. The SNDis of the aggregate street network in the respective time periods are -0.69, -0.58, -0.55 and -0.55. Overall, the SNDi of the aggregate street network has risen: the street network in Vitoria-Gasteiz has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.12 points, but between 1991-2000 and 2001-2014, it rose by just 0.01.

Vitoria-Gasteiz and País Vasco do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Vitoria-Gasteiz peaked in 1976-1990, while the SNDi of street constructions in País Vasco rose steadily.

How do development practices in Vitoria-Gasteiz fare in comparison to others in País Vasco? Most recently in 2001-2014, street construction in Vitoria-Gasteiz was the 4th-most disconnected out of the 4 cities in País Vasco. Its position in the ranks since 1975 has not changed. Vitoria-Gasteiz ranked 4th in 1975, 4th in 1976-1990, 4th in 1991-2000 and 4th in 2001-2014.

Vitoria-Gasteiz and Spain do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Vitoria-Gasteiz peaked in 1976-1990, while the SNDi of street constructions in Spain peaked in 1991-2000.

How do development practices in Vitoria-Gasteiz fare in comparison to others in Spain? Most recently in 2001-2014, street construction in Vitoria-Gasteiz was the 70th-most disconnected out of the 72 cities in Spain. Its position in the ranks since 1975 has risen; relative to other cities in Spain, street construction in Vitoria-Gasteiz has become more disconnected. Vitoria-Gasteiz ranked 71st in 1975, 66th in 1976-1990, 60th in 1991-2000 and 70th in 2001-2014.

Vitoria-Gasteiz and País Vasco follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.

To date, Vitoria-Gasteiz is the 4th-most disconnected out of the 4 cities in País Vasco. Its position in the ranks since 1975 has not changed. Vitoria-Gasteiz ranked 4th in 1975, 4th in 1976-1990, 4th in 1991-2000 and 4th in 2001-2014.

Vitoria-Gasteiz and Spain follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.

To date, Vitoria-Gasteiz is the 71st-most disconnected out of the 72 cities in Spain. Its position in the ranks since 1975 has not changed. Vitoria-Gasteiz ranked 71st in 1975, 71st in 1976-1990, 71st in 1991-2000 and 71st in 2001-2014.

As of 2015, Vitoria-Gasteiz had a built-up area of 21.27 square kilometers, and a population of 203908 people.

These are some other cities with approximately the same population: