Street-network Sprawl in Nandyal, India

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.

Nandyal: city in Andhra Pradesh, India

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 Nandyal, India on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Nandyal as of 2014, the overall level of street-network sprawl is 3.82, which is highly disconnected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 3.43, 3.69, 2.92 and 4.43. Disconnectivity in street construction in Nandyal 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 Nandyal spans a total of 187 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 4.43, which is highly disconnected.

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 3.43, 3.66, 3.5 and 3.82. Disconnectivity in Nandyal's street network follows a zig-zag trend. In 1975, the city was most disconnected; while it was most connected in 2001-2014.

Nandyal and Andhra Pradesh do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Nandyal followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Andhra Pradesh rose steadily.

How do development practices in Nandyal fare in comparison to others in Andhra Pradesh? Most recently in 2001-2014, street construction in Nandyal was the 25th-most disconnected out of the 97 cities in Andhra Pradesh. Its position in the ranks since 1975 has fallen; relative to other cities in Andhra Pradesh, street construction in Nandyal has become more connected. Nandyal ranked 11th in 1975, 15th in 1976-1990, 34th in 1991-2000 and 25th in 2001-2014.

Nandyal and India do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Nandyal followed a zig-zag trend with an overall increase, while the SNDi of street constructions in India rose steadily.

How do development practices in Nandyal fare in comparison to others in India? Most recently in 2001-2014, street construction in Nandyal was the 356th-most disconnected out of the 1716 cities in India. Its position in the ranks since 1975 has fallen; relative to other cities in India, street construction in Nandyal has become more connected. Nandyal ranked 235th in 1975, 272nd in 1976-1990, 556th in 1991-2000 and 356th in 2001-2014.

Nandyal and Andhra Pradesh do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Nandyal followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Andhra Pradesh rose steadily.

To date, Nandyal is the 22nd-most disconnected out of the 97 cities in Andhra Pradesh. Its position in the ranks since 1975 has fallen; relative to other cities in Andhra Pradesh, the street network in Nandyal has become more connected. Nandyal ranked 11th in 1975, 15th in 1976-1990, 23rd in 1991-2000 and 22nd in 2001-2014.

Nandyal and India do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Nandyal followed a zig-zag trend with an overall increase, while the SNDi of street constructions in India rose steadily.

To date, Nandyal is the 357th-most disconnected out of the 1716 cities in India. Its position in the ranks since 1975 has fallen; relative to other cities in India, the street network in Nandyal has become more connected. Nandyal ranked 235th in 1975, 276th in 1976-1990, 378th in 1991-2000 and 357th in 2001-2014.

As of 2015, Nandyal had a built-up area of 7.4 square kilometers, and a population of 253930 people.

These are some other cities with approximately the same population: