Street-network Sprawl in Xuân Hòa, Vietnam

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.

Xuân Hòa: city in Vĩnh Phúc, Vietnam

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 Xuân Hòa, Vietnam on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Xuân Hòa as of 2014, the overall level of street-network sprawl is 4.72, which is highly disconnected.

Trends in street network construction: The SNDis of street construction for the respective time periods are -1.89, 4.63, 2.19 and 7.16. Disconnectivity in street construction in Xuân Hòa follows a zig-zag trend. In 1975, street construction was most disconnected, while construction was most connected in 2001-2014.

Quantity of street network construction: The street network in Xuân Hòa spans a total of 148 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 4.63, 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 -1.89, 4.63, 4.58 and 4.72. Disconnectivity in Xuân Hòa's street network follows a zig-zag trend. In 1975, the city was most disconnected; while it was most connected in 2001-2014.

Xuân Hòa and Vĩnh Phúc follow the same trend in the disconnectivity of their street network constructions. The SNDi for both of these followed a zig-zag trend with an overall increase.

How do development practices in Xuân Hòa fare in comparison to others in Vĩnh Phúc? Most recently in 2001-2014, street construction in Xuân Hòa was the 1st-most disconnected out of the 3 cities in Vĩnh Phúc. Its position in the ranks since 1975 has not changed. Xuân Hòa ranked 1st in 1975, 1st in 1976-1990, 1st in 1991-2000 and 1st in 2001-2014.

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

How do development practices in Xuân Hòa fare in comparison to others in Vietnam? Most recently in 2001-2014, street construction in Xuân Hòa was the 3rd-most disconnected out of the 129 cities in Vietnam. Its position in the ranks since 1975 has risen; relative to other cities in Vietnam, street construction in Xuân Hòa has become more disconnected. Xuân Hòa ranked 95th in 1975, 10th in 1976-1990, 60th in 1991-2000 and 3rd in 2001-2014.

Xuân Hòa and Vĩnh Phúc do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Xuân Hòa followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Vĩnh Phúc peaked in 1976-1990.

To date, Xuân Hòa is the 1st-most disconnected out of the 3 cities in Vĩnh Phúc. Its position in the ranks since 1975 has not changed. Xuân Hòa ranked 1st in 1975, 1st in 1976-1990, 1st in 1991-2000 and 1st in 2001-2014.

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

To date, Xuân Hòa is the 8th-most disconnected out of the 129 cities in Vietnam. Its position in the ranks since 1975 has risen; relative to other cities in Vietnam, the street network in Xuân Hòa has become more disconnected. Xuân Hòa ranked 95th in 1975, 8th in 1976-1990, 9th in 1991-2000 and 8th in 2001-2014.

As of 2015, Xuân Hòa had a built-up area of 3.56 square kilometers, and a population of 71089 people.

These are some other cities with approximately the same population: