Street-network Sprawl in El Abiodh Sidi Cheikh, Algeria

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.

El Abiodh Sidi Cheikh: city in El Bayadh, Algeria

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 El Abiodh Sidi Cheikh, Algeria on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in El Abiodh Sidi Cheikh as of 2014, the overall level of street-network sprawl is 0.48, which is relatively well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 3.26, 0.25, -0.1 and 0.92. The disconnectivity of new streets constructed in El Abiodh Sidi Cheikh fell, then rose. In 1991-2000, new street layouts were the most connected.

Quantity of street network construction: The street network in El Abiodh Sidi Cheikh spans a total of 148 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 0.92, 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 3.26, 0.29, 0.27 and 0.48. The SNDi of the aggregate street network in fell at first, but El Abiodh Sidi Cheikh has worsened in disconnectivity since 2000.

El Abiodh Sidi Cheikh and El Bayadh do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in El Abiodh Sidi Cheikh was at its lowest in 1991-2000, while the SNDi of street constructions in El Bayadh peaked in 1991-2000.

How do development practices in El Abiodh Sidi Cheikh fare in comparison to others in El Bayadh? Most recently in 2001-2014, street construction in El Abiodh Sidi Cheikh was the 1st-most disconnected out of the 1 cities in El Bayadh. Its position in the ranks since 1975 has not changed. El Abiodh Sidi Cheikh ranked 1st in 1975, 1st in 1976-1990, 1st in 1991-2000 and 1st in 2001-2014.

El Abiodh Sidi Cheikh and Algeria do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in El Abiodh Sidi Cheikh was at its lowest in 1991-2000, while the SNDi of street constructions in Algeria was at its lowest in 1976-1990.

How do development practices in El Abiodh Sidi Cheikh fare in comparison to others in Algeria? Most recently in 2001-2014, street construction in El Abiodh Sidi Cheikh was the 78th-most disconnected out of the 95 cities in Algeria. Its position in the ranks since 1975 has fallen; relative to other cities in Algeria, street construction in El Abiodh Sidi Cheikh has become more connected. El Abiodh Sidi Cheikh ranked 12th in 1975, 79th in 1976-1990, 88th in 1991-2000 and 78th in 2001-2014.

El Abiodh Sidi Cheikh and El Bayadh do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in El Abiodh Sidi Cheikh was at its lowest in 1991-2000, while the SNDi of street constructions in El Bayadh peaked in 1991-2000.

To date, El Abiodh Sidi Cheikh is the 1st-most disconnected out of the 1 cities in El Bayadh. Its position in the ranks since 1975 has not changed. El Abiodh Sidi Cheikh ranked 1st in 1975, 1st in 1976-1990, 1st in 1991-2000 and 1st in 2001-2014.

El Abiodh Sidi Cheikh and Algeria do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in El Abiodh Sidi Cheikh was at its lowest in 1991-2000, while the SNDi of street constructions in Algeria was at its lowest in 1976-1990.

To date, El Abiodh Sidi Cheikh is the 81st-most disconnected out of the 95 cities in Algeria. Its position in the ranks since 1975 has fallen; relative to other cities in Algeria, the street network in El Abiodh Sidi Cheikh has become more connected. El Abiodh Sidi Cheikh ranked 12th in 1975, 81st in 1976-1990, 82nd in 1991-2000 and 81st in 2001-2014.

As of 2015, El Abiodh Sidi Cheikh had a built-up area of 2.36 square kilometers, and a population of 116967 people.

These are some other cities with approximately the same population: