"metropolitan zone" is a correct and usable phrase in written English.
It refers to a large urban area that includes a city and its surrounding suburbs or satellite cities, often with a high population density and economic activity. Example: The government is investing in public transportation in the metropolitan zone to improve accessibility and reduce traffic congestion.
A transborder metropolitan zone exists on the Italian-Slovenian frontier.
"We are more vulnerable precisely because of the high population density and the large quantity of high-risk settlements that proliferate in the metropolitan zone".
Convincing Mexico's inhabitants to use their cars less would not only reduce the number of traffic accidents, but would improve the functionality of the city by cutting, for example, the time it takes to commute across the metropolitan zone.
Nowadays, the drastic pollution problems, some of them related with greenhouse gas emissions, have promoted important attempts to face and diminish the global warming effects on the Mexico Valley Metropolitan Zone (MVMZ) as well as on the huge urban zones around the world.
And L.A. is the largest retail & trade employment metropolitan zone in the country.
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Housing needs have been met elsewhere by expanding the metropolitan zones.
The high amount of traffic in metropolitan zones implies the appearance of congestion that is one of the most important complications transport engineers must fight against.
This kind of network is especially suited to universities, commercial buildings, and even metropolitan zones because of features inherited from ad hoc networks such as self-configuration, self-organization, self-discovery, and self-healing allied to a stationary infrastructure composed of routers and Internet gateways [1, 2].
We also observed lower levels of education, higher rates of unemployment, and lower incomes in the smaller towns and areas not influenced much by metropolitan zones.
However, the situation within metropolitan zones, (where populations with relatively high seroprevalence and parasite-associated risk factors exist) merits close vigilance.
