Street-network Sprawl in Oman

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.

Oman

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 Oman on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Oman as of 2014, the overall level of street-network sprawl is 3.76, which is highly disconnected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 4.28, 3.28, 3.92 and 3.64. Disconnectivity in street construction in Oman follows a zig-zag trend. In 1976-1990, street construction was most disconnected, while construction was most connected in 1975.

Quantity of street network construction: The street network in Oman spans a total of 14724 kilometers. The period with the greatest volume of street construction was 1975. These roads have an SNDi of 4.28, 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 4.28, 3.75, 3.8 and 3.76. Disconnectivity in Oman's street network follows a zig-zag trend. In 1976-1990, the country was most disconnected; while it was most connected in 1975.

The level of street-network sprawl in new development in Oman followed a zig-zag trend with an overall decrease. To get a sense of how street development has changed in Oman, we can consider three of its most populous regions: Muscat, Dhofar and Ash Sharqiyah South. Out of the three regions, Muscat and Dhofar do not follow the same trend as the country. The level of street-network sprawl in new development in Muscat was at its lowest in 1976-1990. The level of street-network sprawl in new development in Dhofar peaked in 1991-2000.

How do development practices in Oman fare in comparison to others in the world? Most recently in 2001-2014, street construction in Oman was the 107th-most disconnected out of the 155 countries in the world. Its position in the ranks since 1975 has fallen; relative to other countries in the world, street construction in Oman has become more connected. Oman ranked 30th in 1975, 75th in 1976-1990, 88th in 1991-2000 and 107th in 2001-2014.

The largest city in Oman is Seeb, with a population of 441300 people. Taking into account the entire (i.e. aggregate) street network in Seeb as of 2014, the overall level of street-network sprawl is 3.43, which is highly disconnected. The level of street-network sprawl in new development in Seeb was at its lowest in 1976-1990.

As of 2014, the city with the most disconnected street network in Oman is Al Ghubra with an SNDi of 4.44, which is highly disconnected. Conversely, the most connected city is Salalah with an SNDi of 1.29, which is relatively well-connected. See trends for these cities: Salalah, Al Ghubra

The level of street-network sprawl in the aggregate network in Oman followed a zig-zag trend with an overall decrease. To get a sense of how the aggregate street network has changed in Oman, we can consider three of its most populous regions: Muscat, Dhofar and Ash Sharqiyah South. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Muscat fell steadily. The level of street-network sprawl in the aggregate network in Dhofar rose steadily. The level of street-network sprawl in the aggregate network in Ash Sharqiyah South fell steadily.

To date, Oman is the 62nd-most disconnected out of the 155 countries in the world. Its position in the ranks since 1975 has fallen; relative to other countries in the world, the street network in Oman has become more connected. Oman ranked 30th in 1975, 53rd in 1976-1990, 56th in 1991-2000 and 62nd in 2001-2014.

The largest city in Oman is Seeb, with a population of 441300 people. Taking into account the entire (i.e. aggregate) street network in Seeb as of 2014, the overall level of street-network sprawl is 3.43, which is highly disconnected. The level of street-network sprawl in the aggregate network in Seeb was at its lowest in 1976-1990.