The phrase "are to be widened" is correct and usable in written English.
It is typically used to indicate that something is planned or intended to be expanded or increased in size or scope in the future.
Example: "The roads in the city are to be widened to accommodate the growing traffic."
Alternatives: "are set to be expanded" or "are intended to be enlarged."
Pink marble pavements and Parisian-style street furniture already grace main thoroughfares, while others are to be widened.
The country's main highways, which comprise 2% of India's roads yet carry 40% of the traffic, are to be widened and improved as well.
Earlier this month it was revealed that restrictions on junk food ads are to be widened to cover non-broadcast media, although using a different set of rules to those Ofcom is applying to TV campaigns.
Under changes to the murder laws announced this week, the defences available to women on trial for murder who have killed a partner as a result of domestic violence are to be widened and clarified; whereas men who kill their wives claiming that they were provoked into it because of her "nagging" or alleged infidelity will find that they have far less sympathy from the courts.
The road was to be widened".I was taking down the bamboo supports when Jockin-sir's people came with a stay order," she says.
Avenues were to be widened and the city centre was to be adapted so that cars could become the primary mode of transport.
The sidewalk on 65th Street is to be widened to 27 feet from 15 feet; the street itself is to be narrowed to 38 feet from 50.
An NHS investigation into alleged sexual abuse carried out by the late Jimmy Savile is to be widened with his conduct at hospitals not previously linked to wrongdoing to be examined for the first time.
The staircase up from 65th Street to the north plaza is to be widened to 52 feet from 38 feet with a gentler slope that will allow passers-by to see into the plaza from the street and invite people to sit on the steps.
If the community of users of satellite observations of the marine environment is to be widened to include those involved in daily commercial operations then special-purpose systems should be designed to meet their everyday requirements.
