Street-network Sprawl in Tampico, Mexico

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.

Tampico: city in Tamaulipas, Mexico

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 Tampico, Mexico on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Tampico as of 2014, the overall level of street-network sprawl is 1.04, which is relatively well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 0.12, 1.65, 3.72 and 3.35. Street construction in Tampico increased in disconnectivity initially but has since improved. The streets constructed in 1991-2000 were the most disconnected.

Quantity of street network construction: The street network in Tampico spans a total of 1585 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 1.65, which is relatively 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 0.12, 0.93, 1.0 and 1.04. Overall, the SNDi of the aggregate street network has risen: the street network in Tampico has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.81 points, but between 1991-2000 and 2001-2014, it rose by just 0.04.

Tampico and Tamaulipas do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Tampico peaked in 1991-2000, while the SNDi of street constructions in Tamaulipas rose steadily.

How do development practices in Tampico fare in comparison to others in Tamaulipas? Most recently in 2001-2014, street construction in Tampico was the 3rd-most disconnected out of the 7 cities in Tamaulipas. Its position in the ranks since 1975 has risen; relative to other cities in Tamaulipas, street construction in Tampico has become more disconnected. Tampico ranked 5th in 1975, 4th in 1976-1990, 1st in 1991-2000 and 3rd in 2001-2014.

Tampico and Mexico do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Tampico peaked in 1991-2000, while the SNDi of street constructions in Mexico rose steadily.

How do development practices in Tampico fare in comparison to others in Mexico? Most recently in 2001-2014, street construction in Tampico was the 90th-most disconnected out of the 166 cities in Mexico. Its position in the ranks since 1975 has risen; relative to other cities in Mexico, street construction in Tampico has become more disconnected. Tampico ranked 123rd in 1975, 97th in 1976-1990, 34th in 1991-2000 and 90th in 2001-2014.

Tampico and Tamaulipas follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.

To date, Tampico is the 6th-most disconnected out of the 7 cities in Tamaulipas. Its position in the ranks since 1975 has fallen; relative to other cities in Tamaulipas, the street network in Tampico has become more connected. Tampico ranked 5th in 1975, 6th in 1976-1990, 6th in 1991-2000 and 6th in 2001-2014.

Tampico and Mexico follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.

To date, Tampico is the 139th-most disconnected out of the 166 cities in Mexico. Its position in the ranks since 1975 has fallen; relative to other cities in Mexico, the street network in Tampico has become more connected. Tampico ranked 123rd in 1975, 126th in 1976-1990, 131st in 1991-2000 and 139th in 2001-2014.

As of 2015, Tampico had a built-up area of 85.29 square kilometers, and a population of 622471 people.

These are some other cities with approximately the same population: