Street-network Sprawl in Chirgaon, India

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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:

• nodal degree
• dendricity, the tree-likeness of the street network
• circuity, the ratio of the distance by road to the straight-line distance of two locations on the street network
• sinuosity, the curviness of a street

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:

• Global trends toward urban street-network sprawl
• A global assessment of street-network sprawl

To see the state of street-network sprawl across the globe, visit the sprawlmap.

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Chirgaon: city in Uttar 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 Chirgaon, India on the sprawlmap

How have Chirgaon's street networks changed over time?

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Chirgaon as of 2014, the overall level of street-network sprawl is 3.59, which is highly disconnected.

Trends in street network construction: The SNDis of street construction for the respective time periods are nan, nan, nan and nan. Data was not available in 1975, 1976-1990, 1991-2000 and 2001-2014.

Quantity of street network construction: The street network in Chirgaon spans a total of 35 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of nan, 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 nan, nan, nan and 3.59. Data was not available in 1975, 1976-1990 and 1991-2000.

Chirgaon in context: Street-network sprawl of new development

Chirgaon and Uttar Pradesh 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 Uttar Pradesh rose steadily.

How do development practices in Chirgaon fare in comparison to others in Uttar Pradesh? out of the 204 cities in Uttar Pradesh. Chirgaon ranked . There was no ranking in 1975, 1976-1990, 1991-2000, and 2001-2014 due to unavailable data.

Chirgaon and India 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 India rose steadily.

How do development practices in Chirgaon fare in comparison to others in India? out of the 1716 cities in India. Chirgaon ranked . There was no ranking in 1975, 1976-1990, 1991-2000, and 2001-2014 due to unavailable data.

Chirgaon in context: Aggregate street-network sprawl

Chirgaon and Uttar Pradesh do not follow the same trend in the disconnectivity of their aggregate street networks. There was not enough data from the city, while the SNDi of street constructions in Uttar Pradesh rose steadily.

To date, Chirgaon is the 50th-most disconnected out of the 204 cities in Uttar Pradesh. Chirgaon ranked 50th in 2001-2014. There was no ranking in 1975, 1976-1990, and 1991-2000 due to unavailable data.

Chirgaon and India do not follow the same trend in the disconnectivity of their aggregate street networks. There was not enough data from the city, while the SNDi of street constructions in India rose steadily.

To date, Chirgaon is the 435th-most disconnected out of the 1716 cities in India. Chirgaon ranked 435th in 2001-2014. There was no ranking in 1975, 1976-1990, and 1991-2000 due to unavailable data.

What about other similarly-populated cities?

As of 2015, Chirgaon had a built-up area of 0.85 square kilometers, and a population of 98756 people.

These are some other cities with approximately the same population:

• Caaguazú, Paraguay
• Eruwa Titun, Nigeria
• Mudkhed, India