Street-network Sprawl in Tarn Taran Sahib, 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.

Tarn Taran Sahib: city in Punjab, 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 Tarn Taran Sahib, India on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Tarn Taran Sahib as of 2014, the overall level of street-network sprawl is 1.49, which is relatively well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are -0.76, nan, 4.74 and 1.78. Data was not available in 1976-1990.

Quantity of street network construction: The street network in Tarn Taran Sahib spans a total of 88 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 1.78, 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 -0.76, -0.76, 1.0 and 1.49. Overall, the SNDi of the aggregate street network has risen: the street network in Tarn Taran Sahib has become more disconnected.

Tarn Taran Sahib and Punjab 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 Punjab peaked in 1991-2000.

How do development practices in Tarn Taran Sahib fare in comparison to others in Punjab? Most recently in 2001-2014, street construction in Tarn Taran Sahib was the 25th-most disconnected out of the 40 cities in Punjab. Its position in the ranks since 1975 has fallen; relative to other cities in Punjab, street construction in Tarn Taran Sahib has become more connected. Tarn Taran Sahib ranked 33rd in 1975, 5th in 1991-2000 and 25th in 2001-2014. There was no ranking in 1976-1990 due to unavailable data.

Tarn Taran Sahib 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 Tarn Taran Sahib fare in comparison to others in India? Most recently in 2001-2014, street construction in Tarn Taran Sahib was the 919th-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 Tarn Taran Sahib has become more connected. Tarn Taran Sahib ranked 846th in 1975, 214th in 1991-2000 and 919th in 2001-2014. There was no ranking in 1976-1990 due to unavailable data.

Tarn Taran Sahib and Punjab do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Tarn Taran Sahib rose steadily, while the SNDi of street constructions in Punjab rose steadily.

To date, Tarn Taran Sahib is the 24th-most disconnected out of the 40 cities in Punjab. Its position in the ranks since 1975 has risen; relative to other cities in Punjab, the street network in Tarn Taran Sahib has become more disconnected. Tarn Taran Sahib ranked 33rd in 1975, 35th in 1976-1990, 26th in 1991-2000 and 24th in 2001-2014.

Tarn Taran Sahib and India do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Tarn Taran Sahib rose steadily, while the SNDi of street constructions in India rose steadily.

To date, Tarn Taran Sahib is the 1171st-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 Tarn Taran Sahib has become more connected. Tarn Taran Sahib ranked 846th in 1975, 1358th in 1976-1990, 1179th in 1991-2000 and 1171st in 2001-2014.

As of 2015, Tarn Taran Sahib had a built-up area of 5.94 square kilometers, and a population of 168300 people.

These are some other cities with approximately the same population: