Street-network Sprawl in Caia, Mozambique

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.

Caia: city in Sofala, Mozambique

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 Caia, Mozambique on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Caia as of 2014, the overall level of street-network sprawl is 1.18, which is relatively well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 0.84, -0.27, 1.85 and 0.87. Disconnectivity in street construction in Caia follows a zig-zag trend. In 1976-1990, street construction was most disconnected, while construction was most connected in 1991-2000.

Quantity of street network construction: The street network in Caia spans a total of 52 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 0.87, 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 0.84, 0.77, 1.56 and 1.18. Disconnectivity in Caia's street network follows a zig-zag trend. In 1976-1990, the city was most disconnected; while it was most connected in 1991-2000.

Caia and Sofala do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Caia followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Sofala was at its lowest in 1991-2000.

How do development practices in Caia fare in comparison to others in Sofala? Most recently in 2001-2014, street construction in Caia was the 5th-most disconnected out of the 8 cities in Sofala. Its position in the ranks since 1975 has fallen; relative to other cities in Sofala, street construction in Caia has become more connected. Caia ranked 4th in 1975, 5th in 1976-1990, 6th in 1991-2000 and 5th in 2001-2014.

Caia and Mozambique do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Caia followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Mozambique was at its lowest in 1976-1990.

How do development practices in Caia fare in comparison to others in Mozambique? Most recently in 2001-2014, street construction in Caia was the 35th-most disconnected out of the 57 cities in Mozambique. Its position in the ranks since 1975 has fallen; relative to other cities in Mozambique, street construction in Caia has become more connected. Caia ranked 23rd in 1975, 39th in 1976-1990, 21st in 1991-2000 and 35th in 2001-2014.

Caia and Sofala do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Caia followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Sofala was at its lowest in 1991-2000.

To date, Caia is the 7th-most disconnected out of the 8 cities in Sofala. Its position in the ranks since 1975 has fallen; relative to other cities in Sofala, the street network in Caia has become more connected. Caia ranked 4th in 1975, 5th in 1976-1990, 7th in 1991-2000 and 7th in 2001-2014.

Caia and Mozambique do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Caia followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Mozambique was at its lowest in 1976-1990.

To date, Caia is the 36th-most disconnected out of the 57 cities in Mozambique. Its position in the ranks since 1975 has fallen; relative to other cities in Mozambique, the street network in Caia has become more connected. Caia ranked 23rd in 1975, 34th in 1976-1990, 28th in 1991-2000 and 36th in 2001-2014.

As of 2015, Caia had a built-up area of 0.07 square kilometers, and a population of 66359 people.

These are some other cities with approximately the same population: