Street-network Sprawl in Payshanba, 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.

Payshanba: city in Samarkand, 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 Payshanba, Uzbekistan on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Payshanba as of 2014, the overall level of street-network sprawl is 2.89, which is in the 40th to 60th percentile of disconnectedness.

Trends in street network construction: The SNDis of street construction for the respective time periods are 2.86, 2.15, nan and 4.84. Data was not available in 1991-2000.

Quantity of street network construction: The street network in Payshanba spans a total of 222 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 2.86, which is in the 40th to 60th percentile of disconnectedness.

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 2.86, 2.86, 2.86 and 2.89. The SNDi of the aggregate street network in fell at first, but Payshanba has worsened in disconnectivity since 1990.

Payshanba and Samarkand do not follow the same trend in the disconnectivity of their street network constructions. There was not enough data from the city, while the SNDi of street constructions in Samarkand was at its lowest in 1976-1990.

How do development practices in Payshanba fare in comparison to others in Samarkand? Most recently in 2001-2014, street construction in Payshanba was the 1st-most disconnected out of the 5 cities in Samarkand. Its position in the ranks since 1975 has fallen; relative to other cities in Samarkand, street construction in Payshanba has become more connected. Payshanba ranked 3rd in 1975, 5th in 1976-1990 and 1st in 2001-2014. There was no ranking in 1991-2000 due to unavailable data.

Payshanba and Uzbekistan do not follow the same trend in the disconnectivity of their street network constructions. There was not enough data from the city, while the SNDi of street constructions in Uzbekistan was at its lowest in 1976-1990.

How do development practices in Payshanba fare in comparison to others in Uzbekistan? Most recently in 2001-2014, street construction in Payshanba was the 11th-most disconnected out of the 56 cities in Uzbekistan. Its position in the ranks since 1975 has fallen; relative to other cities in Uzbekistan, street construction in Payshanba has become more connected. Payshanba ranked 22nd in 1975, 35th in 1976-1990 and 11th in 2001-2014. There was no ranking in 1991-2000 due to unavailable data.

Payshanba and Samarkand do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Payshanba was at its lowest in 1976-1990, while the SNDi of street constructions in Samarkand was at its lowest in 1976-1990.

To date, Payshanba is the 2nd-most disconnected out of the 5 cities in Samarkand. Its position in the ranks since 1975 has risen; relative to other cities in Samarkand, the street network in Payshanba has become more disconnected. Payshanba ranked 3rd in 1975, 3rd in 1976-1990, 2nd in 1991-2000 and 2nd in 2001-2014.

Payshanba and Uzbekistan do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Payshanba was at its lowest in 1976-1990, while the SNDi of street constructions in Uzbekistan was at its lowest in 1976-1990.

To date, Payshanba is the 20th-most disconnected out of the 56 cities in Uzbekistan. Its position in the ranks since 1975 has risen; relative to other cities in Uzbekistan, the street network in Payshanba has become more disconnected. Payshanba ranked 22nd in 1975, 21st in 1976-1990, 21st in 1991-2000 and 20th in 2001-2014.

As of 2015, Payshanba had a built-up area of 14.22 square kilometers, and a population of 82049 people.

These are some other cities with approximately the same population: