Street-network Sprawl in Urgench, Uzbekistan

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.

Urgench: city in Khorezm, Uzbekistan

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 Urgench, Uzbekistan on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Urgench as of 2014, the overall level of street-network sprawl is 2.01, which is relatively well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 1.96, 2.01, 1.92 and 2.67. Disconnectivity in street construction in Urgench follows a zig-zag trend. In 1991-2000, street construction was most disconnected, while construction was most connected in 2001-2014.

Quantity of street network construction: The street network in Urgench spans a total of 473 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 2.01, 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 1.96, 2.0, 1.98 and 2.01. Disconnectivity in Urgench's street network follows a zig-zag trend. In 1975, the city was most disconnected; while it was most connected in 2001-2014.

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

How do development practices in Urgench fare in comparison to others in Khorezm? Most recently in 2001-2014, street construction in Urgench was the 1st-most disconnected out of the 4 cities in Khorezm. Its position in the ranks since 1975 has risen; relative to other cities in Khorezm, street construction in Urgench has become more disconnected. Urgench ranked 3rd in 1975, 2nd in 1976-1990, 2nd in 1991-2000 and 1st in 2001-2014.

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

How do development practices in Urgench fare in comparison to others in Uzbekistan? Most recently in 2001-2014, street construction in Urgench was the 31st-most disconnected out of the 56 cities in Uzbekistan. Its position in the ranks since 1975 has risen; relative to other cities in Uzbekistan, street construction in Urgench has become more disconnected. Urgench ranked 41st in 1975, 39th in 1976-1990, 39th in 1991-2000 and 31st in 2001-2014.

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

To date, Urgench is the 2nd-most disconnected out of the 4 cities in Khorezm. Its position in the ranks since 1975 has risen; relative to other cities in Khorezm, the street network in Urgench has become more disconnected. Urgench ranked 3rd in 1975, 2nd in 1976-1990, 2nd in 1991-2000 and 2nd in 2001-2014.

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

To date, Urgench is the 45th-most disconnected out of the 56 cities in Uzbekistan. Its position in the ranks since 1975 has fallen; relative to other cities in Uzbekistan, the street network in Urgench has become more connected. Urgench ranked 41st in 1975, 41st in 1976-1990, 43rd in 1991-2000 and 45th in 2001-2014.

As of 2015, Urgench had a built-up area of 27.86 square kilometers, and a population of 215565 people.

These are some other cities with approximately the same population: