Street-network Sprawl in Margao, 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.

Margao: city in Goa, 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 Margao, India on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Margao as of 2014, the overall level of street-network sprawl is 5.52, which is highly disconnected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 6.04, 5.03, 5.44 and 6.23. The disconnectivity of new streets constructed in Margao fell, then rose. In 1976-1990, new street layouts were the most connected.

Quantity of street network construction: The street network in Margao spans a total of 393 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 5.03, 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 6.04, 5.45, 5.45 and 5.52. The SNDi of the aggregate street network in fell at first, but Margao has worsened in disconnectivity since 2000.

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

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

Margao and India do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Margao was at its lowest in 1976-1990, while the SNDi of street constructions in India rose steadily.

How do development practices in Margao fare in comparison to others in India? Most recently in 2001-2014, street construction in Margao was the 93rd-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 Margao has become more connected. Margao ranked 43rd in 1975, 99th in 1976-1990, 138th in 1991-2000 and 93rd in 2001-2014.

Margao and Goa do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Margao was at its lowest in 1991-2000, while the SNDi of street constructions in Goa was at its lowest in 1976-1990.

To date, Margao is the 2nd-most disconnected out of the 4 cities in Goa. Its position in the ranks since 1975 has fallen; relative to other cities in Goa, the street network in Margao has become more connected. Margao ranked 1st in 1975, 2nd in 1976-1990, 2nd in 1991-2000 and 2nd in 2001-2014.

Margao and India do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Margao was at its lowest in 1991-2000, while the SNDi of street constructions in India rose steadily.

To date, Margao is the 75th-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 Margao has become more connected. Margao ranked 43rd in 1975, 59th in 1976-1990, 66th in 1991-2000 and 75th in 2001-2014.

As of 2015, Margao had a built-up area of 22.62 square kilometers, and a population of 198273 people.

These are some other cities with approximately the same population: